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Vajrayāna (Sanskrit: वज्रयान), also known as Tantric Buddhism, Tantrayāna, Mantrayāna, Secret Mantra, Esoteric Buddhism, Diamond Way, Thunderbolt Way, or the Indestructible Way, is a complex and multifaceted system of Buddhist thought and practice which has evolved over several centuries.
According to Vajrayāna scriptures, the term Vajrayāna refers to one of three vehicles or routes to enlightenment, the other two being the Śrāvakayāna (also known as the Theravada or Hīnayāna) and Mahāyāna.
- 1 History of Vajrayāna in India
- 2 Place within Buddhist tradition
- 3 Philosophical background
- 4 Characteristics of Vajrayana
- 5 Tantra techniques
- 6 Symbols and imagery
- 7 Vajrayana textual tradition
- 8 Schools of Vajrayana
- 9 Academic study difficulties
- 10 See also
- 11 Notes
- 12 References
- 13 Web references
- 14 Sources
- 15 Further reading
- 16 External links
History of Vajrayāna in India
Although the first tantric Buddhist texts appeared in India in the 3rd century and continued to appear until the 12th century, scholars such as Hirakawa Akira assert that the Vajrayāna probably came into existence in the 6th or 7th century, while the term Vajrayāna itself first appeared in the 8th century. The Vajrayāna was preceded by the Mantrayāna, and then followed by the Sahajayāna and Kalacakrayāna.
Although the Vajrayana claims to be as ancient and authentic as any other Buddhist school, it may have grown up gradually in an environment with previously existing texts such as the Mahasannipata and the Ratnaketudharani. The basic position of Vajrayana is still the same as the early Buddhist position of anatta. The changes that took place reflected the changing society of medieval India: the presentation changed, the techniques of the way to enlightenment changed, and the outward appearance of Buddhism came to be dominated by ritualism and arrays of Buddhas, Bodhisattvas, and gods and goddesses.
There are differing theories as to where in the Indian sub-continent that Vajrayāna began. There are assumptions about the origin of Vajrayana in Bengal, Oddiyana, located at Odisha, or in the modern-day Swat District in Pakistan.
The earliest texts appeared around the early 4th century. Nālanda in East India became a center for the development of Vajrayana theory, although it is likely that the university followed, rather than led, the early tantric movement.
Influence of Saivism
Various classes of Vajrayana literature developed as a result of royal courts sponsoring both Buddhism and Saivism. The Mañjusrimulakalpa, which later came to classified under Kriyatantra, states that mantras taught in the Saiva, Garuda and Vaisnava tantras will be effective if applied by Buddhists since they were all taught originally by Manjushri. The Guhyasiddhi of Padmavajra, a work associated with the Guhyasamaja tradition, prescribes acting as a Saiva guru and initiating members into Saiva Siddhanta scriptures and mandalas. The Samvara tantra texts adopted the pitha list from the Saiva text Tantrasadbhava, introducing a copying error where a deity was mistaken for a place.
Sahaja-siddhis and Kalacakra tantra
The Vajrayana established the symbolic terminology and the liturgy that would characterize all forms of the tradition.
The sahaja-siddhi movement developed in the 8th century in Bengal. It was dominated by long-haired, wandering siddhas who openly challenged and ridiculed the Buddhist establishment. Its most important text is the Dohakosa of Saraha. Saraha is considered the founder of the Mahamudra traditions of Vajrayana.
The Kalachakra tantra developed in the 10th century. It is farthest removed from the earlier Buddhist traditions, and incorporates concepts of messianism and astrology not present elsewhere in Buddhist literature.
Place within Buddhist tradition
Various classifications are possible when distinguishing Vajrayana from the other Buddhist traditions.
Third turning of the wheel
Vajrayana can also be seen as the third of the three "turnings of the wheel of dharma":
- In the first turning Shakyamuni Buddha taught the Four Noble Truths at Varanasi in the 5th century BC, which led to the founding of Buddhism and the later early Buddhist schools. Details of the first turning are described in the Dhammacakkapavattana Sutta. The oldest scriptures do not mention any further turnings other than this first turning.
- The Mahayana tradition claims that there was a second turning in which the Perfection of Wisdom sutras were taught at Vulture Peak, which led to the Mahayana schools. Generally, scholars conclude that the Mahayana scriptures (including the Perfection of Wisdom Sutras) were composed from the 1st century CE onwards.[a]
- According to the Vajrayana tradition, there was a third turning which took place at Dhanyakataka sixteen years after the Buddha's enlightenment. Some scholars have strongly denied that Vajrayana appeared at that time, and placed it at a much later time. The first tantric (Vajrayana Buddhist) texts appeared in the 3rd century CE, and they continued to appear until the 12th century.
Sutrayana and Vajrayana
Vajrayana can be distinguished from the Sutrayana. The Sutrayana is the method of perfecting good qualities, where the Vajrayāna is the method of taking the intended outcome of Buddhahood as the path.
Paramitayana and Vajrayana
According to this schema, Indian Mahayana revealed two vehicles (yana) or methods for attaining enlightenment: the method of the perfections (Paramitayana) and the method of mantra (Mantrayana).
The Paramitayana consists of the six or ten paramitas, of which the scriptures say that it takes three incalculable aeons to lead one to Buddhahood. The tantra literature, however, claims that the Mantrayana leads one to Buddhahood in a single lifetime. According to the literature, the mantra is an easy path without the difficulties innate to the Paramitayana. Mantrayana is sometimes portrayed as a method for those of inferior abilities. However the practitioner of the mantra still has to adhere to the vows of the Bodhisattva.
Tibetan Buddhist Rongzom Chokyi Zangpo (1012–1088) held that the views of sutra such as Madhyamaka were inferior to that of tantra, as Koppl notes:
By now we have seen that Rongzom regards the views of the Sutrayana as inferior to those of Mantra, and he underscores his commitment to the purity of all phenomena by criticizing the Madhyamaka objectification of the authentic relative truth.
Characteristics of Vajrayana
The goal of spiritual practice within the Mahayana and Vajrayana traditions is to become a Bodhisattva (i.e. attainment of a state in which one will subsequently become a Buddha—after some further reincarnation), whereas the goal for Theravada practice is specific to become an arhat (i.e. attain enlightenment with no intention of returning, not even as a Buddha).
In the Sutrayana practice, a path of Mahayana, the "path of the cause" is taken, whereby a practitioner starts with his or her potential Buddha-nature and nurtures it to produce the fruit of Buddhahood. In the Vajrayana the "path of the fruit" is taken whereby the practitioner takes his or her innate Buddha-nature as the means of practice. The premise is that since we innately have an enlightened mind, practicing seeing the world in terms of ultimate truth can help us to attain our full Buddha-nature.
Experiencing ultimate truth is said to be the purpose of all the various tantric techniques practiced in the Vajrayana. Apart from the advanced meditation practices such as Mahamudra and Dzogchen, which aim to experience śūnyatā, the empty nature of the enlightened mind that can see ultimate truth, all practices are aimed in some way at purifying the impure perception of the practitioner to allow ultimate truth to be seen. These may be ngöndro "preliminary practices" or the more advanced techniques of the tantric sādhanā.
As with the Mahayana, motivation is a vital component of Vajrayana practice. The Bodhisattva-path is an integral part of the Vajrayana, which teaches that all practices are to be undertaken with the motivation to achieve Buddhahood for the benefit of all sentient beings.
The Vajrayana is based on the concept of "skilful means" (Sanskrit: upaya) as formulated in Mahayana Buddhism. It is a system of lineages, whereby those who successfully receive an empowerment or sometimes called initiation (permission to practice) are seen to share in the mindstream of the realisation of a particular skillful means of the vajra Master. In the Vajrayana these skilful means mainly relate to tantric, Mahamudra or Dzogchen practices. Vajrayana teaches that the Vajrayana techniques provide an accelerated path to enlightenment.
Vajrayana Buddhism is esoteric in the sense that the transmission of certain teachings only occurs directly from teacher to student during an empowerment and cannot be simply learned from a book. Many techniques are also commonly said to be secret, but some Vajrayana teachers have responded that secrecy itself is not important and only a side-effect of the reality that the techniques have no validity outside the teacher-student lineage. In order to engage in Vajrayana practice, a student should have received such an initiation or permission:
If these techniques are not practiced properly, practitioners may harm themselves physically and mentally. In order to avoid these dangers, the practice is kept "secret" outside the teacher/student relationship. Secrecy and the commitment of the student to the vajra guru are aspects of the samaya (Tib. damtsig), or "sacred bond", that protects both the practitioner and the integrity of the teachings."
The teachings may also be considered "self-secret", meaning that even if they were to be told directly to a person, that person would not necessarily understand the teachings without proper context. In this way the teachings are "secret" to the minds of those who are not following the path with more than a simple sense of curiosity.
Vows and behaviour
Practitioners of the Vajrayana need to abide by various tantric vows or samaya of behaviour. These are extensions of the rules of the Prātimokṣa and Bodhisattva vows for the lower levels of tantra, and are taken during initiations into the empowerment for a particular Anuttarayoga Tantra. The special tantric vows vary depending on the specific mandala practice for which the initiation is received, and also depending on the level of initiation. Ngagpas of the Nyingma school keep a special non-celibate ordination.
A tantric guru, or teacher, is expected to keep his or her samaya vows in the same way as his students. Proper conduct is considered especially necessary for a qualified Vajrayana guru. For example, the Ornament for the Essence of Manjushrikirti states:
Distance yourself from Vajra Masters who are not keeping the three vows
who keep on with a root downfall, who are miserly with the Dharma,
and who engage in actions that should be forsaken.
Those who worship them go to hell and so on as a result.
Classifications of tantra
The various Tantra-texts can be classified in various ways.
- Kriyayoga, action tantra, which emphasizes ritual;
- Charyayoga, performance tantra, which emphasizes meditation;
- Yogatantra, yoga tantra;
- Anuttarayogatantra, highest yoga tantra, which is further divided into "mother", "father" and "non-dual" tantras.
Outer and Inner Tantras
A different division is used by the Nyingma or Ancient Translation school. Kriyayoga, Charyayoga and Yogatantra are called the Outer Tantras, while Anuttarayogatantra is divided into Three Inner Tantras, which correspond to the
- Atiyoga, or Dzogchen. The practice of Atiyoga is further divided into three classes: Mental SemDe, Spatial LongDe, and Esoteric Instructional MenNgagDe.
In the highest class of tantra, two stages of practice are distinguished. Details of these practices are normally only explained to practitioners by their teachers after receiving an initiation or 'permission to practice'.
In some Buddhist tantras, both stages can be practiced simultaneously, whereas in others, one first actualizes the generation stage before continuing with the completion stage practices.
In the first stage of generation, one engages in deity yoga. One practices oneself in the identification with the meditational Buddha or deity (yidam) by visualisations, until one can meditate single-pointedly on 'being' the deity.[b]
In the generation stage of Deity Yoga, the practitioner visualizes the "Four Purities" (Tibetan: yongs su dag pa bzhi; yongs dag bzhi)[web 1] which define the principal Tantric methodology of Deity Yoga that distinguishes it from the rest of Buddhism:
- Seeing one's body as the body of the deity
- Seeing one's environment as the pure land or mandala of the deity
- Perceiving one's enjoyments as bliss of the deity, free from attachment
- Performing one's actions only for the benefit of others (bodhichitta motivation, altruism)[web 2]
In the next stage of completion, the practitioner can use either the path of method (thabs lam) or the path of liberation ('grol lam).
At the path of method the practitioner engages in Kundalini yoga practices. These involve the subtle energy system of the body of the chakras and the energy channels. The "wind energy" is directed and dissolved into the heart chakra, where-after the Mahamudra remains, and the practitioner is physically and mentally transformed.
Deity yoga (Wylie: lha'i rnal 'byor, Sanskrit devatāyoga) is the fundamental Vajrayana practice. However, in this context the term "Deity" should not be understood as "creator/god", nor as a being separate from the practitioner.
Deity Yoga employs highly refined techniques of creative imagination, visualisation, and photism in order to self-identify with the divine form and qualities of a particular deity as the union of method or skilful means and wisdom. As His Holiness the Dalai Lama says, "In brief, the body of a Buddha is attained through meditating on it".
By visualizing oneself and one's environment entirely as a projection of mind, it helps the practitioner to become familiar with the mind's ability and habit of projecting conceptual layers over all experience. This experience undermines a habitual belief that views of reality and self are solid and fixed. Deity yoga enables the practitioner to release or purify themself from kleśās and to practice compassion and wisdom simultaneously.
Recent studies indicate that deity yoga yields quantifiable improvements in the practitioner's ability to process visuospatial information, specifically those involved in working visuospatial memory.
The guru is engaged as yidam, as a nirmanakaya manifestation of a Buddha. The process of guru yoga might entail visualization of an entire lineage of masters (refuge tree) as an invocation of the lineage. It usually involves visualization of the guru above or in front of the practitioner. Guru yoga may entail a liturgy or mantra such as the Prayer in Seven Lines. (Tibetan: tshig bdun gsol 'debs)
The Guru or spiritual teacher is essential as a guide during tantric practice, as without their example, blessings and grace, genuine progress is held to be impossible for all but the most keen and gifted. Many tantric texts qualify the Three Jewels of Buddha, Dharma and Sangha thus: "The Guru is Buddha, the Guru is Dharma, the Guru is also Sangha" to reflect their importance for the disciple. The guru is considered even more compassionate and more potent than the Buddha because we can have a direct relationship with the guru. The guru therefore appears with the yidam and dakini in the Three Roots refuge formulation of the three factors essential for tantric attainments.
According to the Vajrayana tradition, at certain times the bodymind is in a very subtle state which can be used by advanced practitioners to transform the mindstream. Such liminal times are known in Tibetan Buddhism as Bardo states and include such transitional states as during meditation, dreaming, sex and death.
Death yoga, or "bringing the three bodies into the path of death, intermediate state (bardo) and rebirth", helps to prepare the practitioner for what they need to do at the time of death. It can be practiced first according to generation stage, and then according to completion stage. The accumulation of meditative practice helps to prepare the practitioner for what they need to do at the time of death.
At the time of death the mind is in a subtle state (clear light) that can open the mind to enlightenment if it is skilfully used to meditate on emptiness (shunyata). During completion stage meditation it is possible to manifest a similar clear light mind and to use it to meditate on emptiness. This meditation causes dualistic appearances to subside into emptiness and enables the practitioner to destroy their ignorance and the imprints of ignorance that are the obstructions to omniscience. It is said that masters like Lama Tsong Khapa used these techniques to achieve enlightenment during the death process. Actually, there are three stages at which it is possible to do this: at the end of the death process, during the bardo (or 'in between period') and during the process of rebirth. During these stages, the mind is in a very subtle state, and an advanced practitioner can use these natural states to make significant progress on the spiritual path. The Tibetan Book of the Dead is an important commentary for this kind of traditional practice.
This death yoga should not be confused with the non-Tantric meditation on impermanence and death, which is a common practice within Buddhist traditions used to overcome desirous attachment.
Another Tibetan ritual practice related to death is phowa (transference of one's consciousness), which can be done by oneself at the moment of death or by ritual specialists, phowa-lamas, on behalf of the dead. For the Anuttarayoga Tantras (Tib. rnal-’byor bla-med-kyi-rgyud), transferring one’s consciousness constitutes one of the two ways to separate the coarse and subtle bodies through meditation. Daniel Cozort explains that ’pho-ba (phowa) merely separates the coarse and subtle bodies without leading to the attainment of an “illusory body” (Tib. sgyu-lus). On the other hand, during the perfection type meditation, known as the “final mental isolation” (Tibetan: sems-dben) because it necessitates the presence of an “actual consort” (Tib. las-rgya), “the winds are totally dissolved in the indestructible drop”, and “the fundamental wind naturally rises into an illusory body”.
Symbols and imagery
The Vajrayana uses a rich variety of symbols and images.
The Sanskrit term "vajra" denoted the thunderbolt, a legendary weapon and divine attribute that was made from an adamantine, or indestructible, substance and which could therefore pierce and penetrate any obstacle or obfuscation. It is the weapon of choice of Indra, the King of the Devas in Hinduism. As a secondary meaning, "vajra" refers to this indestructible substance, and so is sometimes translated as "adamantine" or "diamond". So the Vajrayana is sometimes rendered in English as "The Adamantine Vehicle" or "The Diamond Vehicle".
A vajra is also a scepter-like ritual object (Standard Tibetan: རྡོ་རྗེ་ dorje), which has a sphere (and sometimes a gankyil) at its centre, and a variable number of spokes, 3, 5 or 9 at each end (depending on the sadhana), enfolding either end of the rod. The vajra is often traditionally employed in tantric rituals in combination with the bell or ghanta; symbolically, the vajra may represent method as well as great bliss and the bell stands for wisdom, specifically the wisdom realizing emptiness.
Imagery and ritual in deity yoga
Representations of the deity, such as a statues (murti), paintings (thangka), or mandala, are often employed as an aid to visualization, in Deity yoga. Mandalas are sacred enclosures, sacred architecture that house and contain the uncontainable essence of a yidam. In the book The World of Tibetan Buddhism, the Dalai Lama describes mandalas thus: "This is the celestial mansion, the pure residence of the deity."
All ritual in Vajrayana practice can be seen as aiding in this process of visualization and identification. The practitioner can use various hand implements such as a vajra, bell, hand-drum (damaru) or a ritual dagger (phurba), but also ritual hand gestures (mudras) can be made, special chanting techniques can be used, and in elaborate offering rituals or initiations, many more ritual implements and tools are used, each with an elaborate symbolic meaning to create a special environment for practice. Vajrayana has thus become a major inspiration in traditional Tibetan art.
Vajrayana textual tradition
The Vajrayana tradition has developed an extended body of texts:
Though we do not know precisely at present just how many Indian tantric Buddhist texts survive today in the language in which they were written, their number is certainly over one thousand five hundred; I suspect indeed over two thousand. A large part of this body of texts has also been translated into Tibetan, and a smaller part into Chinese. Aside from these, there are perhaps another two thousand or more works that are known today only from such translations. We can be certain as well that many others are lost to us forever, in whatever form. Of the texts that survive a very small proportion has been published; an almost insignificant percentage has been edited or translated reliably.
Schools of Vajrayana
Although there is historical evidence for Vajrayana Buddhism in Southeast Asia and elsewhere (see History of Vajrayana above), today the Vajrayana exists primarily in the form of the two major sub-schools of Tibetan Buddhism and Esoteric Buddhism in Japan known as Shingon, with a handful of minor subschools utilising lesser amounts of esoteric or tantric materials.
The distinction between traditions is not always rigid. For example, the tantra sections of the Tibetan Buddhist canon of texts sometimes include material not usually thought of as tantric outside the Tibetan Buddhist tradition, such as the Heart Sutra and even versions of some material found in the Pali Canon.[c]
The Tibetan Buddhist schools, based on the lineages and textual traditions of the Kangyur and Tengyur of Tibet, are found in Tibet, Bhutan, northern India, Nepal, southwestern and northern China, Mongolia and various constituent republics of Russia that are adjacent to the area, such as Amur Oblast, Buryatia, Chita Oblast, the Tuva Republic and Khabarovsk Krai. Tibetan Buddhism is also the main religion in Kalmykia.
Vajrayana Buddhism was established in Tibet in the 8th century when Śāntarakṣita was brought to Tibet from India at the instigation of the Dharma King Trisong Detsen, some time before 767. He established the basis of what later came to be known as the Nyingma school. As a Tantric Mahasiddha Padmasambhava's contribution ensured that Vajrayana became part of Tibetan Buddhism. While Vajrayana Buddhism is a part of Tibetan Buddhism in that it forms a core part of every major Tibetan Buddhist school, it is not identical with it. Buddhist scholar Alexander Berzin refers to "the Mahayana and Vajrayana traditions of Tibetan Buddhism".[web 3] Training in the "common paths" of Sutra (including Lamrim) are said to be the foundation for the "uncommon path" of Vajrayana. The Vajrayana techniques add 'skillful means' to the general Mahayana teachings for advanced students. The 'skillful means' of the Vajrayana in Tibetan Buddhism refers to tantra techniques, Dzogchen (Tibetan; Sanskrit:maha-ati) and Mahamudra (Tibetan:Chagchen).
Nepalese Newar Buddhism
Newar Buddhism is practiced by Newars in Nepal. This is the only form of Vajrayana Buddhism in which the scriptures are written in Sanskrit. Its priests do not follow celibacy and are called Vajracharyas.
The Acharya religion is said to be a form of Vajrayana Buddhism transmitted from India to the Kingdom of Dali of the Bai people. The monks have families, eat meat and drink wine. The Zhengde Emperor banned it in 1507.
Chinese Esoteric Buddhism
Esoteric teachings followed the same route into northern China as Buddhism itself, arriving via the Silk Road sometime during the first half of the 7th century, during the Tang Dynasty. Esoteric Mantrayana practices arrived from India just as Buddhism was reaching its zenith in China, and received sanction from the emperors of the Tang Dynasty. During this time, three great masters came from India to China: Śubhakarasiṃha, Vajrabodhi, and Amoghavajra. These three masters brought the esoteric teachings to their height of popularity in China. During this era, the two main source texts were the Mahāvairocana Abhisaṃbodhi Tantra, and the Tattvasaṃgraha Tantra. Traditions in the Sinosphere still exist for these teachings, and they more or less share the same doctrines as Shingon, with many of its students themselves traveling to Japan to be given transmission at Mount Koya.
Esoteric methods were naturally incorporated into Chinese Buddhism during the Tang Dynasty. Śubhakarasiṃha's most eminent disciple, Master Yixing (Ch. 一行), was a member of the Chán school. In such a way, in Chinese Buddhism there was no major distinction between exoteric and esoteric practices, and the northern school of Chán Buddhism even became known for its esoteric practices of dhāraṇīs and mantras.
The practice of Tantric Buddhism in Western Xia led to the spread of some sexually related customs. Before they could get married to men of their own ethnicity when they reached 30 years old, Uighur women in Shanxi in the 12th century had children after having sex with multiple Han Chinese men, with her desirability as a wife corresponding to if she had been with a large number of men.
During the Yuan Dynasty, the Mongol emperors made Esoteric Buddhism the official religion of China, and Tibetan lamas were given patronage at the court. A common perception was that this patronage of lamas caused corrupt forms of tantra to become widespread. When the Mongol Yuan Dynasty was overthrown and the Ming Dynasty was established, the Tibetan lamas were expelled from the court, and this form of Buddhism was denounced as not being an orthodox path.
In late imperial China, the early traditions of Esoteric Buddhism were still thriving in Buddhist communities. Robert Gimello has also observed that in these communities, the esoteric practices associated with Cundī were extremely popular among both the populace and the elite.
In China and countries with large Chinese populations such as Taiwan, Malaysia, and Singapore, Esoteric Buddhism is most commonly referred to as the Chinese term Mìzōng (密宗), or "Esoteric School." Traditions of Chinese Esoteric Buddhism are most commonly referred to as referred as Tángmì (唐密), "Tang Dynasty Esoterica," or Hànchuán Mìzōng (漢傳密宗), "Han Transmission Esoteric School" (Hànmì 漢密 for short), or Dōngmì (東密), "Eastern Esoterica," separating itself from Tibetan and Newar traditions. These schools more or less share the same doctrines as Shingon. Casual attempts to revive Esoteric Buddhism occur in modern china.
See Zhenyan at encyclopedia.com on Chinese Esoteric Buddhism.
The Shingon school is found in Japan and includes practices, known in Japan as Mikkyō, which are similar in concept to those in Vajrayana Buddhism. The lineage for Shingon Buddhism differs from that of Tibetan Vajrayana, having emerged from India during the 9th-11th centuries in the Pala Dynasty and Central Asia (via China) and is based on earlier versions of the Indian texts than the Tibetan lineage. Shingon shares material with Tibetan Buddhism–-such as the esoteric sutras (called Tantras in Tibetan Buddhism) and mandalas – but the actual practices are not related. The primary texts of Shingon Buddhism are the Mahavairocana Sutra and Vajrasekhara Sutra. The founder of Shingon Buddhism was Kukai, a Japanese monk who studied in China in the 9th century during the Tang Dynasty and brought back Vajrayana scriptures, techniques and mandalas then popular in China. The school mostly died out or was merged into other schools in China towards the end of the Tang Dynasty but flourished in Japan. Shingon is one of the few remaining branches of Buddhism in the world that continues to use the siddham script of the Sanskrit language.
Although the Tendai school in China and Japan does employ some esoteric practices, these rituals came to be considered of equal importance with the exoteric teachings of the Lotus Sutra. By chanting mantras, maintaining mudras, or practicing certain forms of meditation, Tendai maintains that one is able to understand sense experiences as taught by the Buddha, have faith that one is innately an enlightened being, and that one can attain enlightenment within the current lifetime.
Shugendō was founded in 7th century Japan by the ascetic En no Gyōja, based on the Queen's Peacocks Sutra. With its origins in the solitary hijiri back in the 7th century, Shugendō evolved as a sort of amalgamation between Esoteric Buddhism, Shinto and several other religious influences including Taoism. Buddhism and Shinto were amalgamated in the shinbutsu shūgō, and Kūkai's syncretic religion held wide sway up until the end of the Edo period, coexisting with Shinto elements within Shugendō
In 1613 during the Edo period, the Tokugawa Shogunate issued a regulation obliging Shugendō temples to belong to either Shingon or Tendai temples. During the Meiji Restoration, when Shinto was declared an independent state religion separate from Buddhism, Shugendō was banned as a superstition not fit for a new, enlightened Japan. Some Shugendō temples converted themselves into various officially approved Shintō denominations. In modern times, Shugendō is practiced mainly by Tendai and Shingon sects, retaining an influence on modern Japanese religion and culture.
Vajrayana texts exhibit a wide range of literary characteristics—usually a mix of verse and prose, almost always in a Sanskrit that "transgresses frequently against classical norms of grammar and usage," although also occasionally in various Middle Indic dialects or elegant classical Sanskrit.
The Dunhuang manuscripts also contain Tibetan Tantric manuscripts. Dalton and Schaik (2007, revised) provide an excellent online catalogue listing 350 Tibetan Tantric Manuscripts] from Dunhuang in the Stein Collection of the British Library which is currently fully accessible online in discrete digitized manuscripts.[web 4] With the Wylie transcription of the manuscripts they are to be made discoverable online in the future. These 350 texts are just a small portion of the vast cache of the Dunhuang manuscripts.
Academic study difficulties
Serious Vajrayana academic study in the western world is in early stages due to the following obstacles:
- Although a large number of Tantric scriptures are extant, they have not been formally ordered or systematized.
- Due to the esoteric initiatory nature of the tradition, many practitioners will not divulge information or sources of their information.
- As with many different subjects, it must be studied in context and with a long history spanning many different cultures.
- Ritual as well as doctrine need to be investigated.
Buddhist tantric practice are categorized as secret practice; this is to avoid misinformed people from harmfully misusing the practices. A method to keep this secrecy is that tantric initiation is required from a master before any instructions can be received about the actual practice. During the initiation procedure in the highest class of tantra (such as the Kalachakra), students must take the tantric vows which commit them to such secrecy.[web 5] "Explaining general tantra theory in a scholarly manner, not sufficient for practice, is likewise not a root downfall. Nevertheless, it weakens the effectiveness of our tantric practice." [web 6]
The terminology associated with Vajrayana Buddhism can be confusing. Most of the terms originated in the Sanskrit language of tantric Indian Buddhism and may have passed through other cultures, notably those of Japan and Tibet, before translation for the modern reader. Further complications arise as seemingly equivalent terms can have subtle variations in use and meaning according to context, the time and place of use. A third problem is that the Vajrayana texts employ the tantric tradition of twilight language, a means of instruction that is deliberately coded. These obscure teaching methods relying on symbolism as well as synonym, metaphor and word association add to the difficulties faced by those attempting to understand Vajrayana Buddhism:
In the Vajrayana tradition, now preserved mainly in Tibetan lineages, it has long been recognized that certain important teachings are expressed in a form of secret symbolic language known as saṃdhyā-bhāṣā, 'Twilight Language'. Mudrās and mantras, maṇḍalas and cakras, those mysterious devices and diagrams that were so much in vogue in the pseudo-Buddhist hippie culture of the 1960s, were all examples of Twilight Language [...] 
The term Tantric Buddhism was not one originally used by those who practiced it. As scholar Isabelle Onians explains:
"Tantric Buddhism" [...] is not the transcription of a native term, but a rather modern coinage, if not totally occidental. For the equivalent Sanskrit tāntrika is found, but not in Buddhist texts. Tāntrika is a term denoting someone who follows the teachings of scriptures known as Tantras, but only in Saivism, not Buddhism [...] Tantric Buddhism is a name for a phenomenon which calls itself, in Sanskrit, Mantranaya, Vajrayāna, Mantrayāna or Mantramahāyāna (and apparently never Tantrayāna). Its practitioners are known as mantrins, yogis, or sādhakas. Thus, our use of the anglicised adjective “Tantric” for the Buddhist religion taught in Tantras is not native to the tradition, but is a borrowed term which serves its purpose.
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- Tawang Taktshang Monastery
- Tantric Theravada
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