God in Christianity
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In Christianity, God is the eternal being that created and preserves the world. Christians believe God to be both transcendent (wholly independent of, and removed from, the material universe) and immanent (involved in the world). Christian teachings of the immanence and involvement of God and his love for humanity exclude the belief that God is of the same substance as the created universe.
Early Christian views of God were expressed in the Pauline Epistles and the early creeds which proclaimed one God and the divinity of Jesus almost in the same breath, as in 1 Corinthians (8:5-6): "For even if there are so-called gods, whether in heaven or on earth (as indeed there are many 'gods' and many 'lords'), yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live." This began to differentiate the Christian views of God from the Jewish teachings of the time.
The theology of the attributes and nature of God has been discussed since the earliest days of Christianity, with Irenaeus writing in the 2nd century: "His greatness lacks nothing, but contains all things". In the 8th century, John of Damascus listed eighteen attributes which remain widely accepted. As time passed, theologians developed systematic lists of these attributes, some based on statements in the Bible (e.g., the Lord's Prayer, stating that the Father is in Heaven), others based on theological reasoning. The Kingdom of God is a prominent phrase in the Synoptic Gospels and while there is near unanimous agreement among scholars that it represents a key element of the teachings of Jesus, there is little scholarly agreement on its exact interpretation.
Although the New Testament does not have a formal doctrine of the Trinity as such, it does repeatedly speak of the Father, the Son, and the Holy Spirit in such a way as to "compel a trinitarian understanding of God." This never becomes a "tritheism." This does not imply three Gods. Around the year 200, Tertullian formulated a version of the doctrine of the Trinity which clearly affirmed the divinity of Jesus and came close to the later definitive form produced by the Ecumenical Council of 381. The doctrine of the Trinity can be summed up as: "The One God exists in Three Persons and One Substance, as God the Father, God the Son and God the Holy Spirit." Trinitarians, who form the large majority of Christians, hold it as a core tenet of their faith. Nontrinitarian denominations define the Father, the Son, and the Holy Spirit in a number of different ways.
Development of the theology of God 
Early Christian views of God (before the gospels were written) are reflected in Apostle Paul's statement in 1 Corinthians (8:5-6), written ca. AD 53-54, i.e., about twenty years after the crucifixion of Jesus:
- "for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live."
Apart from asserting that there is but one God, Paul's statement (which is likely based on pre-Pauline confessions) includes a number of other significant elements: he distinguishes Christian belief from the Jewish background of the time by referring to Jesus and the Father almost in the same breath, and by conferring on Jesus the title of divine honor "Lord", as well as calling him Christ. 
- "The God that made the world and all things therein, he, being Lord of heaven and earth"
and reflects on the relationship between God and Christians:
- "that they should seek God, if haply they might feel after him and find him, though he is not far from each one of us for in him we live."
The Pauline Epistles also include a number of references to the Holy Spirit, with the theme which appears in 1 Thessalonians (4:8) "…God, the very God who gives you his Holy Spirit" appearing throughout his epistles. In John 14:26 Jesus also refers to "the Holy Spirit, whom the Father will send in my name".
By the end of the 1st century, Clement of Rome had repeatedly referred to the Father, Son and Holy Spirit, and linked the Father to creation, 1 Clement 19.2 stating: "let us look steadfastly to the Father and Creator of the universe". By the middle of the 2nd century, in Against Heresies Irenaeus had emphasized (Book 4, chapter 5) that the Creator is the "one and only God" and the "maker of heaven and earth". These preceded the formal presentation of the concept of Trinity by Tertullian early in the 3rd century.
The period from late 2nd century to the beginning of the 4th century (approximately 180-313) is generally called the "epoch of the Great Church" and witnessed significant theological development, and the consolidation and formalization of a number of Christian teachings.
From the 2nd century onwards, western creeds started with an affirmation of belief in "God the Father (Almighty)" and the primary reference of this phrase was to "God in his capacity as Father and creator of the universe". This did not exclude either the fact the "eternal father of the universe was also the Father of Jesus the Christ" or that he had even "vouchsafed to adopt [the believer] as his son by grace". Eastern creeds (those we know come from a later date) began with an affirmation of faith in "one God" and almost always expanded this by adding "the Father Almighty, Maker of all things visible and invisible" or words to that effect.
As time passed, theologians and philosophers developed more precise understandings of the nature of God and began to produce systematic lists of his attributes (i.e., qualities or characteristics). These varied in detail, but traditionally the attributes fell into two groups, those based on negation (God is impassible) and those positively based on eminence (God is infinitely good). Ian Ramsey suggested that there are three groups and that some attributes such as simplicity and perfection have a different logical dynamic which from such attributes as infinite goodness since there are relative forms of the latter but not of the former.
In Christian theology the name of God has always had much deeper meaning and significance than being just a label or designator. It is not a human invention, but has divine origin and is based on divine revelation. Respect for the name of God is one of the Ten Commandments, which Christians teachings view not simply an avoidance of the improper use of the name of God, but as a directive to exalt it, through both pious deeds and praise. This is reflected in the first petition in the Lord's Prayer addressed to God the Father: "Hallowed be thy Name".
Going back to the Church Fathers, the name of God has been seen as a representation of the entire system of "divine truth" revealed to the faithful "that believe on his name" as in John 1:12 or "walk in the name of the Lord our God" in Micah 4:5. In Revelation 3:12 those who bear the name of God are destined for Heaven. John 17:6 presents the teachings of Jesus as the manifestation of the name of God to his disciples.
John 12:27 presents the sacrifice of Jesus the Lamb of God, and the ensuing salvation delivered through it as the glorification of the name of God, with the voice from Heaven confirming Jesus' petition ("Father, glorify thy name") by saying: "I have both glorified it, and will glorify it again" referring to the Baptism and crucifixion of Jesus.
The Bible usually uses the name of God in the singular (e.g.,  However, general references to the name of God may branch to other special forms which express his multifaceted attributes. Scripture presents many references to the names for God, but the key names in the Old Testament are: God the High and Exalted One, El-Shaddai and Jehovah. In the New Testament Theos, Kurios and Pateras (πατέρας i.e., Father in Greek) are the essential names.or ), generally using the terms in a very general sense rather than referring to any special designation of God.
Attributes and nature 
The theological underpinnings of the attributes and nature of God have been discussed since the earliest days of Christianity. In the 2nd century Irenaeus addressed the issue and expounded on some attributes, e.g., in his Against Heresis (Book IV, Chapter 19) stated: "His greatness lacks nothing, but contains all things". Irenaeus based his attributes on three sources: Scripture, prevailing mysticism and popular piety. Today, some of the attributes associated with God continue to be based on statements in the Bible, e.g., the Lord's Prayer states that the Father is in Heaven, while other attributes are derived by theological reasoning.
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|Attributes of God|
In the 8th century, John of Damascus listed eighteen attributes for God in his An Exact Exposition of the Orthodox Faith (Book 1, Chapter 8). These eighteen attributes were divided into four groups based on time (e.g., being everlasting), space (e.g., being boundless), matter or quality and the list continues to be influential to date, partially appearing in some form in various modern formulations. In the 13th century, Thomas Aquinas focused on a shorter list of just eight attributes, namely: simplicity, perfection, goodness, incomprehensibility, omnipresence, immutability, eternity and oneness. Other formulations include the 1251 list of the Fourth Lateran Council which was then adopted at Vatican I in 1870 and the Westminster Shorter Catechism in the 17th century.
Two attributes of God that place him above the world, yet acknowledge his involvement in the world, are transcendence and immanence. Transcendence means that God is eternal and infinite, not controlled by the created world and beyond human events. Immanence means that God is involved in the world, and Christian teachings have long acknowledged his attention to human affairs. However, unlike pantheistic religions, in Christianity God's being is not of the substance of the created universe.
Traditionally, some theologians such as Louis Berkhof distinguish between the communicable attributes (those that human beings can also have) and the incommunicable attributes (those that belong to God alone). However, others such as Donald Macleod hold that all the suggested classifications are artificial and without basis.
There is a general agreement among theologians that it would be a mistake to conceive of the essence of God existing by itself and independently of the attributes or of the attributes being an additional characteristic of the Divine Being. They are essential qualities which exist permanently in his very Being and are co-existent with it. Any alteration in them would imply an alteration in the essential being of God.
Hick suggests that when listing the attributes of God, the starting point should be his self-existence ("aseity") which implies that his eternal and unconditioned nature. Hick goes on to consider the following additional attributes: Creator being the source of all that composes his creation ("creatio ex nihilo") and the sustainer of what he has brought into being; Personal; Loving, Good; and Holy. Berkhof also starts with self-existence but moves on to immutability; infinity, which implies perfection eternity and omnipresence; unity. He then analyses a series of intellectual attributes: knowledge-omniscience; wisdom; veracity and then, the moral attributes of goodness (including love, grace, mercy and patience); holiness and righteousness before dealing finally with his sovereignty.
Kingdom of God and eschatology 
Kingship and Kingdom 
The Christian characterization of the relationship between God and humanity involves the notion of the "Kingship of God", whose origins go back to the Old Testament, and may be seen as a consequence of the creation of the world by God. The "enthronement psalms" (Psalms 45, 93, 96, 97-99) provide a background for this view with the exclamation "The Lord is King". However, in later Judaism a more "national" view was assigned to God's Kingship in which the awaited Messiah may be seen as a liberator and the founder of a new state of Israel.
The term "Kingdom of God" does not appear in the Old Testament, although "his Kingdom" and "your Kingdom" are used in some cases when referring to God. However, the Kingdom of God (the Matthean equivalent being "Kingdom of Heaven") is a prominent phrase in the Synoptic Gospels (appearing 75 times), and there is near unanimous agreement among scholars that it represents a key element of the teachings of Jesus. Yet, R. T. France points out that while the concept of "Kingdom of God" has an intuitive meaning to lay Christians, there is hardly any agreement among scholars about its meaning in the New Testament. Some scholars see it as a Christian lifestyle, some as a method of world evangelization, some as the rediscovery of charismatic gifts, others relate it to no present or future situation, but the world to come. France states that the phrase Kingdom of God is often interpreted in many ways to fit the theological agenda of those interpreting it.
End times 
Interpretations of the term Kingdom of God have given rise to wide ranging eschatological debates among scholars with diverging views, yet no overall consensus has emerged among scholars. From Augustine to the Reformation the arrival of the Kingdom had been identified with the formation of the Christian Church, but this view was later abandoned and by the beginning of the 20th century the apocalyptic interpretation of the Kingdom had gained ground. In this view (also called the "consistent eschatology") the Kingdom of God did not start in the 1st century, but is a future apocalyptic event that is yet to take place.
By the middle of the 20th century realized eschatology which in contrast viewed the Kingdom as non-apocalyptic but as the manifestation of divine sovereignty over the world (realized by the ministry of Jesus) had gathered a scholarly following. In this view the Kingdom is held to be available in the present. The competing approach of Inaugurated eschatology was later introduced as the "already and not yet" interpretation. In this view the Kingdom has already started, but awaits full disclosure at a future point. These diverging interpretations have since given rise to a good number of variants, with various scholars proposing new eschatological models that borrow elements from these.
Hebrews 12:23 refers to "God the Judge of all" and the notion that all humans will eventually "be judged" is an essential element of Christian teachings. A number of New Testament passages (e.g., and ) and later credal confessions indicate that the task of judgement is assigned to Jesus. John 5:22 states that "neither does the Father judge any man, but he has given all judgment unto the Son". Acts 10:42 refers to the resurrected Jesus as: "he who is ordained of God to be the Judge of the living and the dead." The role played by Jesus in the judgement of God is emphasized in the most widely used Christian confessions, with the Nicene Creed stating that Jesus "sits on the right hand of the Father; shall come again, with glory, to judge the living and the dead; whose kingdom shall have no end". The Apostle's Creed includes a similar confession.
A number of gospel passages warn against sin and suggest a path of righteousness to avoid the judgement of God. For instance, the Sermon on the Mount in Matthew 5:22-26 teaches the avoidance of sin and the Parables of the Kingdom (Matthew 13:49) state that at the moment of judgement the angels will "sever the wicked from among the righteous and shall cast them into the furnace of fire". Christians can thus enjoy forgiveness that lifts them from the judgement of God by following the teachings of Jesus and through a personal fellowship with him.
History and foundation 
In early Christianity, the concept of salvation was closely related to the invocation of the "Father, Son and Holy Spirit". Since the 1st century, Christians have called upon God with the name "Father, Son and Holy Spirit" in prayer, baptism, communion, exorcism, hymn-singing, preaching, confession, absolution and benediction. This is reflected in the saying: "Before there was a 'doctrine' of the Trinity, Christian prayer invoked the Holy Trinity".
The term "Trinity" does not explicitly appear in the Bible, but Trinitarians believe the concept as later developed is consistent with biblical teachings. The New Testament includes a number of the usages of the three-fold liturgical and doxological formula, e.g., 2 Corinthians 1:21-22 stating: "he that establisheth us with you in Christ, and anointed us, is God; who also sealed us, and gave [us] the earnest of the Spirit in our hearts". Christ receiving "authority and co-equal divinity" is mentioned in Matthew 28:18: "All authority hath been given unto me in heaven and on earth" as well as John 3:35, John 13:3, John 17:1. And the Spirit being both "of God" and "of Christ" appears in Galatians 4:6, the Book of Acts (16:7), John 15:26 and Romans 8:14-17.
- "The Church ... believes in one God, the Father Almighty, Maker of heaven, and earth, and the sea, and all things that are in them; and in one Christ Jesus, the Son of God, who became incarnate for our salvation; and in the Holy Spirit".
Around AD 213 in Adversus Praxeas (chapter 3) Tertullian provided a formal representation of the concept of the Trinity, i.e., that God exists as one "substance" but three "Persons": The Father, the Son and the Holy Spirit. In defense of the coherence of the Trinity Tertullian wrote (Adversus Praxeas 3): "The Unity which derives the Trinity out of its own self is so far from being destroyed, that it is actually supported by it."
Tertullian also discussed how the Holy Spirit proceeds from the Father and the Son.
The First Council of Nicaea in AD 325 and later the First Council of Constantinople in AD 381 defined the dogma "in its simplest outlines in the face of pressing heresies" and the version used thereafter dates to 381. In the 5th century, in the west, Saint Augustine expanded on the theological development in his On the Trinity, while the major development in the east was due to John of Damascus in the 8th century. The theology eventually reached its classical form in the writings of Thomas Aquinas in the 13th century.
Bernhard Lohse states that the doctrine of the Trinity does not go back to non-Christian sources such as Plato or Hinduism and that all attempts at suggesting such connections have floundered. The majority of Christians are now Trinitarian and regard belief in the Trinity as a test of true orthodoxy of belief.
The doctrine 
- "The One God exists in Three Persons and One Substance."
Strictly speaking, the doctrine is a mystery that can "neither be known by unaided human reason", nor "cogently demonstrated by reason after it has been revealed"; even so "it is not contrary to reason" being "not incompatible with the principles of rational thought".
We worship one God in Trinity, and Trinity in Unity;
Neither confounding the persons nor dividing the substance.
For there is one Person of the Father, another of the Son, and another of the Holy Spirit.
But the Godhead of the Father, of the Son, and of the Holy Spirit, is all one; the Glory equal, the Majesty co-eternal.
Such as the Father is, such is the Son, and such is the Holy Spirit.
To Trinitarian Christians (which include Catholic Christians, Eastern Orthodox Christians, and most Protestant denominations), God the Father is not at all a separate god from the Son (of whom Jesus is the incarnation) and the Holy Spirit, the other Hypostases of the Christian Godhead.
The 20th century witnessed an increased theological focus on the doctrine of the Trinity, partly due to the efforts of Karl Barth in his fourteen volume Church Dogmatics. This theological focus relates the revelation of the Word of God to the Trinity, and argues that the doctrine of Trinity is what distinguishes the "Christian concept of God" from all other religions.
The Father 
The emergence of Trinitarian theology of God the Father in early Christianity was based on two key ideas: first the shared identity of the Yahweh of the Old Testament and the God of Jesus in the New Testament, and then the self-distinction and yet the unity between Jesus and his Father. An example of the unity of Son and Father is Matthew 11:27: "No one knows the Son except the Father and no one knows the Father except the Son", asserting the mutual knowledge of Father and Son.
The concept of fatherhood of God does appear in the Old Testament, but is not a major theme. While the view of God as the Father is used in the Old Testament, it only became a focus in the New Testament, as Jesus frequently referred to it. This is manifested in the Lord's prayer which combines the earthly needs of daily bread with the reciprocal concept of forgiveness. And Jesus' emphasis on his special relationship with the Father highlights the importance of the distinct yet unified natures of Jesus and the Father, building to the unity of Father and Son in the Trinity.
The paternal view of God as the Father extends beyond Jesus to his disciples, and the entire Church, as reflected in the petitions Jesus submitted to the Father for his followers at the end of the Farewell Discourse, the night before his crucifixion. Instances of this in the Farewell Discourse are John 14:20 as Jesus addresses the disciples: "I am in my Father, and you in me, and I in you" and in John 17:22 as he prays to the Father: "I have given them the glory that you gave me, that they may be one as we are one."
In Trinitarian theology, God the Father is the "arche" or "principium" (beginning), the "source" or "origin" of both the Son and the Holy Spirit, and is considered the eternal source of the Godhead. The Father is the one who eternally begets the Son, and the Father eternally breaths the Holy Spirit. The Son is eternally born from God the Father, and that the Spirit eternally proceeds from the Father.
Yet, notwithstanding this difference as to origin, Father is one with, co-equal to, co-eternal, and con-substantial with the Son and the Holy Spirit, each Person being the one eternal God and in no way separated, who is the creator: all alike are uncreated and omnipotent. Thus, the Divine Unity consists of God the Father, with his Son and his Spirit distinct from God the Father and yet perfectly united together in him. Because of this, the Trinity is beyond reason and can only be known by revelation.
Trinitarians believe that God the Father is not pantheistic, in that he not viewed as identical to the universe, but exists outside of creation, as its Creator. He is viewed as a loving and caring God, a Heavenly Father who is active both in the world and in people's lives. He created all things visible and invisible in love and wisdom, and man for his own sake.
The Son 
Since early Christianity, a number of titles have been attributed to Jesus, including Messiah and the Son of God. Theologically, these are different attributions: Messiah refers to his fulfilling the expected Old Testament prophecies, while Son of God refers to a paternal relationship. The third title, namely God the Son, is distinct from both Messiah and Son of God. Its theology as part of the doctrine of the Trinity was formalized well over a century after those.
According to the Gospels, Jesus was conceived by the Holy Spirit and born from the Virgin Mary. The Biblical accounts of Jesus' ministry include: his baptism, miracles, preaching, teaching, and healing. The narrative of the gospels place significant emphasis on the death of Jesus, devoting about one third of the text to just seven days, namely the last week of the life of Jesus in Jerusalem. The core Christian belief is that through the death and resurrection of Jesus, sinful humans can be reconciled to God and thereby are offered salvation and the promise of eternal life. The belief in the redemptive nature of Jesus' death predates the Pauline letters and goes back to the earliest days of Christianity and the Jerusalem church. The Nicene Creed's statement that "for our sake he was crucified" is a reflection of this core belief.
The two Christological concerns as to how Jesus could be truly God while preserving faith in the existence of one God and how the human and the divine could be combined in one person were fundamental concerns from well before the First Council of Nicaea (325). However, the theology of "God the Son" was eventually reflected in the statement of the Nicene Creed in the 4th century.
The Chalcedonian Creed of 451, accepted by the majority of Christians, holds that Jesus is God incarnate and "true God and true man" (or both fully divine and fully human). Jesus, having become fully human in all respects, suffered the pains and temptations of a mortal man, yet he did not sin. As fully God, he defeated death and rose to life again. The Third Council of Constantinople in 680 then held that both divine and human wills exist in Jesus, with the divine will having precedence, leading and guiding the human will.
In mainstream Christianity, Jesus Christ as God the Son is the second Person of the Holy Trinity, due to his eternal relation to the first Person (God as Father). He is considered coequal with the Father and Holy Spirit and is all God and all human: the Son of God as to his divine nature, while as to his human nature he is from the lineage of David.
More recently, discussions of the theological issues related to God the Son and its role in the Trinity were addressed in the 20th century in the context of a "Trinity-based" perspective on divine revelation.
The Holy Spirit 
In mainstream Christianity, the Holy Spirit is one of the three divine persons of the Holy Trinity who make up the single substance of God; that is, the Spirit is considered to act in concert with and share an essential nature with God the Father and God the Son (Jesus). The New Testament has much to say about the Holy Spirit. The Holy Spirit's presence was especially felt following the ascension of Christ, although not to the exclusion of an early presence as attested by the Old Testament and throughout the New Testament.:p.39 The Christian theology of the Holy Spirit, or pneumatology, was the last piece of Trinitarian theology to be fully explored and developed, and there is thus greater theological diversity among Christian understandings of the Spirit than there is among understandings of the Son and the Father. Within Trinitarian theology, the Holy Spirit is usually referred to as the "Third Person" of the triune God—with the Father being the First Person and the Son the Second Person.
The sacredness of the Holy Spirit is affirmed in all three Synoptic Gospels (Matthew 12:30-32, Mark 3:28-30 and Luke 12:8-10) which proclaim that blasphemy against the Holy Spirit is the unforgivable sin. The participation of the Holy Spirit in the tripartite nature of conversion is apparent in Jesus' final post-Resurrection instruction to his disciples at the end of the Gospel of Matthew (28:19): "make disciples of all the nations, baptizing them into the name of the Father and of the Son and of the Holy Spirit". The Holy Spirit plays a key role in the Pauline epistles, to the point that their pneumatology is almost inseparable from their Christology. In the Johannine writings, three separate terms, namely Holy Spirit, Spirit of Truth and Paraclete are used.
Reflecting the Annunciation in Luke 1:35, the early Apostles' Creed states that Jesus was "conceived by the Holy Spirit". The Nicene Creed refers to the Holy Spirit as "the Lord and Giver of Life" who with the Father and the Son together is "worshiped and glorified". While in the act of the Incarnation, God the Son became manifest as the Son of God, the same did not take place for God the Holy Spirit which remained unrevealed. Yet, as in 1 Corinthians 6:19 God the Spirit continues to dwell in bodies of the faithful.
In Christian theology Holy Spirit is believed to perform specific divine functions in the life of the Christian or the church. The action of the Holy Spirit is seen as an essential part of the bringing of the person to the Christian faith. The new believer is "born again of the Spirit".
The Holy Spirit enables Christian life by dwelling in the individual believers and enables them to live a righteous and faithful life. He acts as Comforter or Paraclete, one who intercedes, or supports or acts as an advocate, particularly in times of trial. He acts to convince unredeemed persons both of the sinfulness of their actions and thoughts, and of their moral standing as sinners before God. The Holy Spirit both inspired the writing of the scriptures and now interprets them to the Christian and/or church. He
Trinitarian differences 
In Eastern Orthodox theology, essence of God being that which is beyond human comprehension and can not be defined and or approached by human understanding. Roman Catholic teachings are somewhat similar in considering the mysteries of the Trintiy as being beyond human reason. However, differences exist in that in Roman Catholic theology and teaching, God the Father is the eternal source of the Son (begot the Son by an eternal generation) and of the Holy Spirit (by an eternal procession from the Father and the Son) and the one who breaths the Holy Spirit with and through the Son, but the Eastern Orthodox consider the Spirit to proceed from the Father alone.
Most Protestant denominations and other mainstream traditions arising since the Reformation, hold general Trinitarian beliefs and theology regarding God the Father similar to that of Roman Catholicism. This includes churches arising from Anglicanism, Baptist, Methodism, Lutheranism and Presbyterianism. Likewise, The Oxford Dictionary of the Christian Church describes the Trinity as "the central dogma of Christian theology". However, a precise representative view of Protestant Trinitarian theology regarding "God the Father", etc., is more difficult to provide, given the diverse and less centralized nature of the various Protestant churches.
|Conceptions of God|
Some Christian traditions reject the doctrine of the Trinity, and are called nontrinatarian. These groups differ from one another in their views, variously depicting Jesus as a divine being second only to God the Father, Yahweh of the Old Testament in human form, God (but not eternally God), prophet, or simply a holy man. Some broad definitions of Protestantism include these groups within Protestantism, but most definitions do not.
Nontrinatarianism goes back to the early centuries of Christian history and groups such as the Arians, Ebionites, Gnostics, and others. These nontrinatarian views were rejected by many bishops such as Irenaeus and subsequently by the Ecumenical Councils. The Nicene Creed raised the issue of the relationship between Jesus' divine and human natures. Nontrinitarianism was rare among Christians for many centuries, and those rejecting the doctrine of the Trinity faced hostility from other Christians, but the 19th century saw the establishment of a number of groups in North America and elsewhere.
In Jehovah's Witness theology, only God the Father is the one true and almighty God, even over his Son Jesus Christ. While the Witnesses acknowledge Christ's pre-existence, perfection, and unique "Sonship" with God the Father, and believe that Christ had an essential role in creation and redemption, and is the Messiah, they believe that only the Father is without beginning.
In the theology of God in Mormonism, the most prominent conception of God is the Godhead, a divine council of three distinct beings: Elohim (the Father), Jehovah (the Son, or Jesus), and the Holy Spirit. The Father and Son are considered to have perfected, material bodies, while the Holy Spirit has a body of spirit. Mormonism recognize the divinity of the Father, Son, and Holy Spirit, but believe they are distinct beings, united not in substance but in will and purpose, and they are each omniscient, omnipotent, and omni-benevolent.
See also 
- Basic Christian Doctrine by John H. Leith (Jan 1, 1992) ISBN 0664251927 pages 55-56
- Introducing Christian Doctrine (2nd Edition) by Millard J. Erickson (Apr 1, 2001) ISBN 0801022509 pages 87-88
- Berkhof, L. Systematic Theology Banner of Truth publishers:1963, p.61
- Perhaps even pre-Pauline creeds.
- One God, One Lord by Larry W. Hurtado (Oct 25, 2003) ISBN 0567089878 pages 1-2
- The Blackwell Companion to The New Testament by David E. Aune (Mar 23, 2010) ISBN 1405108258 page 424
- Apostle Paul: His Life and Theology by Udo Schnelle (Nov 1, 2005) ISBN 0801027969 page 396
- Irenaeus of Lyons by Eric Francis Osborn (Nov 26, 2001) ISBN 0521800064 pages 27-29
- Global Dictionary of Theology by William A. Dyrness, Veli-Matti Kärkkäinen, Juan F. Martinez and Simon Chan (Oct 10, 2008) ISBN 0830824545 pages 352-353
- Christian Doctrine by Shirley C. Guthrie (Jul 1, 1994) ISBN 0664253687 pages 111 and 100
- Hirschberger, Johannes. Historia de la Filosofía I, Barcelona: Herder 1977, p.403
- Dictionary of Biblical Imagery by Leland Ryken, James C. Wilhoit and Tremper Longman III (Nov 11, 1998) ISBN 0830814515 pages 478-479
- Divine Government: God's Kingship in the Gospel of Mark by R.T. France (10 Mar 2003) ISBN 1573832448 pages 1-3
- Stagg, Frank. New Testament Theology. Broadman Press, 1962. ISBN 0-0854-1613-7
- Prestige G.L. Fathers and Heretics SPCK:1963, p. 29
- Kelly, J.N.D. Early Christian Doctrines A & C Black:1965, p.280
- The Nicene Faith: Formation Of Christian Theology by John Behr (Jun 30, 2004) ISBN 088141266X pages 3-4
- Life in the Trinity: An Introduction to Theology with the Help of the Church Fathers by Donald Fairbairn (Sep 28, 2009) ISBN 0830838732 pages 48-50
- Mercer Dictionary of the Bible edited by Watson E. Mills, Roger Aubrey Bullard 2001 ISBN 0865543739 page 935
- Kelly, J.N.D. Early Christian Doctrines A & C Black: 1965, p 115
- Theology: The Basics by Alister E. McGrath (Sep 21, 2011) ISBN 0470656751 pages 117-120
- Theology of the New Testament by Udo Schnelle (Nov 1, 2009) ISBN 0801036046 page 477
- Theology of Paul the Apostle by James D. G. Dunn 2003 ISBN 0-567-08958-4 pages 418-420
- The anointed community: the Holy Spirit in the Johannine tradition by Gary M. Burge 1987 ISBN 0-8028-0193-5 pages 14-21
- The Doctrine of God: A Global Introduction by Veli-Matti Kärkkäinen 2004 ISBN 0801027527 pages 70-73
- Peter Stockmeier in the Encyclopedia of Theology: A Concise Sacramentum Mundi edited by Karl Rahner ISBN 0860120066 (New York: Seabury Press, 1975) page 375-376 "In the following period, c. 180-313, these structures already determine essentially the image of the Church which claims a universal mission in the Roman Empire. It has rightly been termed the period of the Great Church, in view of its numerical growth, its constitutional development and its intense theological activity."
- Kelly, J.N.D. Early Christian Creeds Longmans:1960, p.136; p.139; p.195 respectively
- Ian T. Ramsey, Religious Language SCM 1967, pp.50ff
- Systematic Theology by Louis Berkhof (Sep 24, 1996) ISBN 0802838200 pages47-51
- Mercer dictionary of the Bible by Watson E. Mills, Roger Aubrey Bullard 1998 ISBN 0-86554-373-9 page 336
- The Ten Commandments: Interpretation: Resources for the Use of Scripture in the Church by Patrick D. Miller (Aug 6, 2009) ISBN 0664230555 page 111
- Theology of the New Testament by Georg Strecker (2000) ISBN 0664223362 page 282
- Ten Commandments by Arthur W. Pink (Dec 30, 2007) ISBN 1589603753 pages 23-24
- John 11-21 (Ancient Christian Commentary on Scripture) by Joel C. Elowsky (May 23, 2007) ISBN 0830810994 page 237
- Wiersbe Bible Commentary by Warren W. Wiersbe (Nov 1, 2007) ISBN 0781445396 page 274
- Manual Of Christian Doctrine by Louis Berkhof (Aug 1, 2007) ISBN 1930367902 pages 19-20
- Manual Of Christian Doctrine by Louis Berkhof (Aug 1, 2007) ISBN 1930367902 pages 21-23
- Donald Macleod, Behold Your God (Christian Focus Publications, 1995), 20-21.
- Berkhof, Louis Systematic Theology, Banner of Truth 1963, pp.57-81 & p.46 respectively
- John H. Hick, Philosophy of Religion Prentice-Hall 1973, pp. 7-14
- Mercer Dictionary of the Bible by Watson E. Mills, Edgar V. McKnight and Roger A. Bullard (May 1, 2001) ISBN 0865543739 page 490
- Encyclopedia of Theology: A Concise Sacramentum Mundi by Karl Rahner (Dec 28, 2004) ISBN 0860120066 page 1351
- Dictionary for Theological Interpretation of the Bible by Kevin J. Vanhoozer, N. T. Wright, Daniel J. Treier and Craig Bartholomew (20 Jan 2006) ISBN 0801026946 page 420
- Familiar Stranger: An Introduction to Jesus of Nazereth by Michael James McClymond (Mar 22, 2004) ISBN 0802826806 pages 77-79
- Studying the Historical Jesus: Evaluations of the State of Current Research by Bruce Chilton and Craig A. Evans (Jun 1998) ISBN 9004111425 pages 255-257
- An Introduction to the New Testament and the Origins of Christianity by Delbert Royce Burkett (Jul 22, 2002) ISBN 0521007208 page 246
- A Theology of the New Testament by George Eldon Ladd (Sep 2, 1993) ISBN 0802806805 pages 55-57
- Introducing Christian Doctrine (2nd Edition) by Millard J. Erickson (Apr 1, 2001) ISBN 0801022509 pages 391-392
- Systematic Theology Vol 2 by Wolfhart Pannenberg (Oct 27, 2004) ISBN 0567084663 pages 390-391
- The Oxford Companion to the Bible by Bruce M. Metzger and Michael David Coogan (Oct 14, 1993) ISBN page 157
- Theological Dictionary of the New Testament (Volume III) by Gerhard Kittel and Gerhard Friedrich (Jun 1966) ISBN 0802822452 pages 936
- Vickers, Jason E. Invocation and Assent: The Making and the Remaking of Trinitarian Theology. Wm. B. Eerdmans Publishing, 2008. ISBN 0-8028-6269-1 pages 2-5
- The Cambridge Companion to the Trinity by Peter C. Phan 2011 ISBN 0521701139 pages 3-4
- Elizabeth Lev, "Dimming the Pauline Spotlight; Jubilee Fruits" Zenit 2009-06-25
- Richardson, Alan. An Introduction to the Theology of the New Testament SCM: 1961, p122f,158
- The Trinity by Roger E. Olson, Christopher Alan Hall 2002 ISBN 0802848273 pages 29-31
- Tertullian, First Theologian of the West by Eric Osborn (4 Dec 2003) ISBN 0521524954 pages 116-117
- Systematic Theology by Louis Berkhof (Sep 24, 1996) ISBN 0802838200 page 83
- Oxford Dictionary of the Christian Church (1974), Cross & Livingstone (eds), art "Trinity, Doctrine of"
- A Short History of Christian Doctrine by Bernhard Lohse 1978 ISBN 0800613414 page 37
- Critical Terms for Religious Studies. Chicago: The University of Chicago Press, 1998. Credo Reference.27 July 2009
- The Cambridge Companion to the Trinity by Peter C. Phan 2011 ISBN 0521701139 pages 173-174
- The Trinity: Global Perspectives by Veli-Matti Kärkkäinen (Jan 17, 2007) ISBN 0664228909 page 8
- The Trinity: Global Perspectives by Veli-Matti Kärkkäinen (Jan 17, 2007) ISBN 0664228909 pages 10-13
- Global Dictionary of Theology by William A. Dyrness, Veli-Matti Kärkkäinen, Juan F. Martinez and Simon Chan (Oct 10, 2008) ISBN 0830824545 pages 169-171
- The International Standard Bible Encyclopedia by Geoffrey W. Bromiley 1988 ISBN 0-8028-3785-9 page 571-572
- The Doctrine of God: A Global Introduction by Veli-Matti Kärkkäinen 2004 ISBN 0801027527 pages 37-41
- Symbols of Jesus by Robert C. Neville (Feb 4, 2002) ISBN 0521003539 pages 26-27
- Jesus and His Own: A Commentary on John 13-17 by Daniel B. Stevick (Apr 29, 2011) Eeardmans ISBN 0802848656 page 46
- The Westminster Dictionary of Christian Theology by Alan Richardson and John Bowden (Jan 1, 1983) ISBN 0664227481 page 36
- The Oxford Handbook of the Trinity by Gilles Emery O. P. and Matthew Levering (27 Oct 2011) ISBN 0199557810 page 263
- Catholic catechism at the Vatican web site, items: 242 245 237
- God Our Father by John Koessler (Sep 13, 1999) ISBN 0802440681 page 68
- International Standard Bible Encyclopedia: E-J by Geoffrey W. Bromiley (Mar 1982) ISBN 0802837824 pages 515-516
- Catholic Catechism items: 356 and 295 at the Vatican web site
- The Westminster Dictionary of Christian Theology by Alan Richardson and John Bowden (Jan 1, 1983) ISBN 0664227481 page 101
- Historical Theology: An Introduction by Geoffrey W. Bromiley 2000 ISBN 0567223574 pages 128-129
- Christology: Biblical And Historical by Mini S. Johnson ISBN 8183240070 page 307
- The Ecumenical Councils of the Catholic Church: A History by Joseph F. Kelly (Sep 1, 2009) ISBN 0814653766 pages 19-22
- Practical Christian Theology: by Floyd H. Barackman 1998 ISBN 0825423740 pages 149-151
- Matthew by David L. Turner 2008 ISBN 0-8010-2684-9 page 613
- Christian Theology by J. Glyndwr Harris (Mar 2002) ISBN 1902210220 pages 12-15
- Lord Jesus Christ: Devotion to Jesus in Earliest Christianity by Larry W. Hurtado (Sep 14, 2005) ISBN 0802831672 pages 130-133
- Historical Theology: An Introduction by Geoffrey W. Bromiley 2000 ISBN 0567223574 pages 50-51
- Late Antiquity: A Guide to the Postclassical World by G. W. Bowersock, Peter Brown and Oleg Graba 1999 ISBN 0674511735 page 605
- A Short History of Christian Doctrine by Bernhard Lohse (Jan 5, 1978) ISBN 0800613414 pages 90-93
- The Westminster Dictionary of Christian Theology by Alan Richardson and John Bowden (Jan 1, 1983) ISBN 0664227481 page 169
- Introducing Christian Doctrine(2nd Edition) by Millard J. Erickson (Apr 1, 2001) ISBN 0801022509 pages 237-238
- Encyclopedia of Theology: A Concise Sacramentum Mundi by Karl Rahner (Dec 28, 2004) ISBN pages 692-694
- For Biblical passages see: ; ; ;
- Introduction to the Theology of Karl Barth by Geoffrey William Bromiley (Nov 3, 2000) ISBN 0567290549 page 19
- The Renewal of Trinitarian Theology: Themes, Patterns & Explorations by Roderick T. Leupp (Oct 1, 2008) ISBN 0830828893 page 31
- Systematic Theology Vol 1 by Wolfhart Pannenberg (Nov 11, 2004) ISBN 0567081788 page 332
- Pneumatology: The Holy Spirit in Ecumenical, International, and Contextual Perspective by Veli-Matti Kärkkäinen (Jun 1, 2002) ISBN 080102448X pages 120-121
- Jesus and the Gospels: An Introduction and Survey by Craig L. Blomberg 2009 ISBN 0-8054-4482-3 page 280
- Matthew 28:19
- Lord, giver of life by Jane Barter Moulaison 2006 ISBN 0-88920-501-9 page 5
- The power of God in Paul's letters by Petrus J. Gräbe 2008 ISBN 978-3-16-149719-3 pages 248-249
- Spirit of Truth: The origins of Johannine pneumatology by John Breck 1990 ISBN 0-88141-081-0 pages 1-5
- Invitation to Theology by Michael Jinkins (Jan 26, 2001) ISBN 0830815627 pages 60 and 134-135
- Invitation to Theology by Michael Jinkins (Jan 26, 2001) ISBN 0830815627 page 193
- The mystery of the Triune God by John Joseph O'Donnell 1988 ISBN 0-7220-5760-1 page 75
- The Wiersbe Bible Commentary: The Complete New Testament by Warren W. Wiersbe 2007 ISBN 978-0-7814-4539-9 page 471
- Millard J. Erickson (1992). Introducing Christian Doctrine. Baker Book House. pp. 265–270.
- Though the term "born again" is most frequently used by evangelical Christians, most denominations do consider that the new Christian is a "new creation" and "born again". See for example the Catholic Encyclopedia 
- The Holy Spirit and His Gifts. J. Oswald Sanders. Inter-Varsity Press. chapter 5.
- T C Hammond; Revised and edited by David F Wright (1968). In Understanding be Men:A Handbook of Christian Doctrine. (sixth ed.). Inter-Varsity Press. p. 134.
- The Mystical Theology of the Eastern Orthodox Church by V. Lossky ISBN page 77
- Systematic Theology by Francis Schussler Fiorenza and John P. Galvin (May 1, 2011) ISBN 0800662911 pages 193-194
- The Oxford Dictionary of the Christian Church (Oxford University Press, 2005 ISBN 978-0-19-280290-3), article Trinity, doctrine of the
- Trinitarian Soundings in Systematic Theology by Paul Louis Metzger 2006 ISBN 0567084108 pages 36 and 43
- Encyclopedia of Protestantism by J. Gordon Melton 2008 ISBN 0816077460 page 543
- Insight on the Scriptures 2. 1988. p. 1019.
- Dahl, Paul E. (1992). "Godhead". In Ludlow, Daniel H. Encyclopedia of Mormonism. New York: Mcmillan. pp. 552–53. ISBN 0-02-904040-X..