Heresy in the Catholic Church

Roman Catholic teachings on heresy first began in 380 AD with the Edict of Thessalonica. Later in the thirteenth century heresy was defined by Thomas Aquinas as "a species of infidelity in men who, having professed the faith of Christ, corrupt its dogmas." St. Thomas continues; "The right Christian faith consists in giving one's voluntary assent to Christ in all that truly belongs to His teaching. There are, therefore, two ways of deviating from Christianity: the one by refusing to believe in Christ Himself, which is the way of infidelity, common to Pagans and Jews; the other by restricting belief to certain points of Christ's doctrine selected and fashioned at pleasure, which is the way of heretics. The subject-matter of both faith and heresy is, therefore, the deposit of the faith, that is, the sum total of truths revealed in Scripture and Tradition as proposed to our belief by the Church. The believer accepts the whole deposit as proposed by the Church; the heretic accepts only such parts of it as commend themselves to his own approval."

The Catholic Church asserts and teaches that its doctrines are the authoritative understandings of the faith taught by Christ and that the Holy Spirit protects the Church from falling into error when teaching these doctrines. To deny one or more of those doctrines, therefore, is to deny the faith of Christ. Heresy is both the non orthodox belief itself, and the act of holding to that belief.

Heresy differs from apostasy. The apostate a fide abandons wholly the faith of Christ either by embracing Judaism, Islamism, Paganism, or simply by falling into naturalism and complete neglect of religion; the heretic always retains faith in Christ. Heresy also differs from schism. Schismatics, says St. Thomas, in the strict sense, are they who of their own will and intention separate themselves from the unity of the Church. The unity of the Church consists in the connection of its members with each other and of all the members with the head. Now this head is Christ whose representative in the Church is the supreme pontiff. And therefore the name of schismatics is given to those who will not submit to the supreme pontiff nor communicate with the members of the Church subject to him. Since the definition of Papal Infallibility, schism usually implies the heresy of denying this dogma. Heresy is opposed to faith; schism to charity; so that, although all heretics are schismatics because loss of faith involves separation from the Church, not all schismatics are necessarily heretics, since a man may, from anger, pride, ambition, or the like, sever himself from the communion of the Church and yet believe all the Church proposes for our belief (II-II, Q. xxix, a. 1). Such a one, however, would be more properly called rebellious than heretical.

The Church makes several distinctions as to the seriousness of an individual heterodoxy and its closeness to true heresy. Only a belief that directly contravenes an Article of Faith, or that has been explicitly rejected by the Church, is labelled as actual "heresy."

Canon 751 of the Catholic Church's Code of Canon law promulgated by Pope John Paul II in 1983 (abbreviated "C.I.C." for Codex Iuris Canonici), the juridical systematization of ancient law currently binding the world's one billion Catholics, defines heresy as the following: "Heresy is the obstinate denial or doubt after the reception of baptism of some truth which is to be believed by divine and Catholic faith." The essential elements of canonical heresy therefore technically comprise 1) obstinacy, or continuation in time; 2) denial (a proposition contrary or contradictory in formal logic to a dogma) or doubt (a posited opinion, not being a firm denial, of the contrary or contradictory proposition to a dogma); 3) after reception of valid baptism; 4) of a truth categorized as being of "Divine and Catholic Faith," meaning contained directly within either Sacred Scripture or Sacred Tradition per Can. 750 par. 1 C.I.C. ("de fide divina") AND proposed as 'de fide divina' by either a Pope having spoken solemnly "ex cathedra" on his own (example: dogmatic definition of the Assumption of the Blessed Virgin Mary in 1950), or defined solemnly by an Ecumenical Council in unison with a Pope (ex: the definition of the Divinity of Christ in the Council of Chalcedon) ("de fide catholica").

The impelling motives are many: intellectual pride or exaggerated reliance on one's own insight; the illusions of religious zeal; the allurements of political or ecclesiastical power; the ties of material interests and personal status; and perhaps others more dishonourable. Heresy thus willed is imputable to the subject and carries with it a varying degree of guilt; it is called formal, because to the material error it adds the informative element of "freely willed".

An important distinction is that between formal and material heresy. The difference is one of the heretic's subjective belief about his opinion. The heretic who is aware that his belief is at odds with Catholic teaching and yet continues to cling to his belief pertinaciously is a formal heretic. This sort of heresy is sinful because in this case the heretic knowingly holds an opinion that, in the words of the first edition of the Catholic Encyclopedia, "is destructive of the virtue of Christian faith . . . disturbs the unity, and challenges the Divine authority, of the Church" and "strikes at the very source of faith." Material heresy, on the other hand, means that the individual is unaware that his heretical opinion denies, in the words of Canon 751, "some truth which is to be believed by divine and Catholic faith." The opinion of a material heretic is still heresy, and it produces the same objective results as formal heresy, but because of his ignorance he commits no sin by holding it.

The penalty for a baptised Catholic above the age of 18 who obstinately, publicly, and voluntarily manifests his or her adherence to an objective heresy is automatic excommunication ("latae sententiae") according to Can. 1364 par.1 C.I.C..

A belief that the church has not directly rejected, or that is at variance with less important church teachings, is given the label, sententia haeresi proxima, meaning "opinion approaching heresy." A theological argument, belief, or theory that does not constitute heresy in itself, but which leads to conclusions which might be held to do so, is termed propositio theologice erronea, or "erroneous theological proposition." Finally, if the theological position only suggests but does not necessarily lead to a doctrinal conflict, it might be given the even milder label of sententia de haeresi suspecta, haeresim sapiens, meaning "opinion suspected, or savoring, of heresy."

Some significant controversies of doctrine have risen over the course of history. At times there have been many heresies over single points of doctrine, particularly in regard to the nature of the Trinity, the doctrine of transubstantiation and the immaculate conception.

The Church has always fought in favour of orthodoxy and the Pope's authority. At various times in history, it has had varying degrees of power to resist or punish heretics, once it had defined them.

See also

• Heresy in Christianity