The Tathāgatagarbha sūtras are a group of Mahayana sutras that present the concept of the "womb" or "embryo" (garbha) of the tathāgata, the Buddha. Every sentient being has the possibility to attain Buddhahood because of the tathāgatagarbha.

This concept originated in India but was a major influence in the development of East Asian Buddhism, where it was equated with the concept of Buddhadhātu, "Buddha-element" or "Buddha-nature".

The Tathāgatagarbha sūtras include the Tathāgatagarbha Sūtra, Śrīmālādevī Siṃhanāda Sūtra, Mahāyāna Mahāparinirvāṇa Sūtra and the Aṅgulimālīya Sūtra. Related ideas are in found in the Laṅkāvatāra Sūtra and Avataṃsaka Sūtra. Another major text, the Awakening of Faith, was originally composed in China, while the Mahāyāna Mahāparinirvāṇa Sūtra was considerably extended in China .

Comparing the tradition of Tathāgatagarbha sūtras to the Yogachara and Madhyamaka schools, Paul Williams writes that this collection appears to have been less prominent in India, but became increasingly popular and significant in Central Asian Buddhism and East Asian Buddhism.

Nomenclature and etymology The Sanskrit term tathāgatagarbha () may be parsed into tathāgata "the one thus gone" (referring to Buddhahood) and garbha "root, embryo, essence".

Development of the concept

Luminous mind in the Nikāyas In the Anguttara Nikāya, the Buddha refers to a "luminous mind".

The canon does not support the identification of the "luminous mind" with nirvanic consciousness, though it plays a role in the realization of nirvana. Upon the destruction of the fetters, according to one scholar, "the shining nibbanic consciousness flashes out of the womb of arahantship, being without object or support, so transcending all limitations."

Tathagatagarbha and Buddha-nature Though the tathagatagarbha and the Buddha-nature do not have exactly the same meaning, in the Buddhist tradition they became equated. In the Angulimaliya Sūtra and in the Mahāyāna Mahāparinirvāṇa Sūtra the terms "Buddha-nature" (Buddha-dhātu) and "tathāgatagarbha" are synonyms.

All are agreed that the tathāgatagarbha is an immortal, inherent transcendental essence or potency and that it resides in a concealed state (concealed by mental and behavioural negativities) in every single being, even the worst - the icchantika.

Although attempts are made in the Buddhist sutras to explain the tathāgatagarbha, it remains ultimately mysterious and allegedly unfathomable to the ordinary, unawakened person, being only fully knowable by perfect Buddhas themselves.

The tathāgatagarbha itself needs no cultivation, only uncovering or discovery, as it is already present and perfect within each being:

Charles Muller comments that the tathagatagarbha is the mind's original pure nature and has neither a point of origination nor a point of cessation: 'tathagatagarbha expresses the already perfect aspect of the original nature of the mind that is clear and pure without arising or cessation.'

The tathāgatagarbha is the ultimate, pure, ungraspable, inconceivable, irreducible, unassailable, boundless, true and deathless quintessence of the Buddha's emancipatory reality, the very core of his sublime nature.

List of sutras

According to modern scholarship Michael Radich provides the following list of key Indian sutras associated with Tathāgatagarbha: Tathāgatagarbha Sūtra (Buddha Womb Sutra, c. 200-250 CE) Śrīmālādevī Siṃhanāda Sūtra (Lion's Roar of Queen Srimala, 3rd century CE) Anūnatvāpurnatvanirdeśa (The Teaching on the Absence of Increase and Decrease) Mahābheri Sūtra (Great Dharma Drum Sutra) Mahāmegha Sūtra (Great Cloud Sutra) Aṅgulimālīya Sūtra (Angulimala Sutra) Mahāyāna Mahāparinirvāṇa Sūtra (Great Final Nirvana Sutra, c. 200 CE), very influential in Chinese Buddhism Laṅkāvatāra Sūtra (Descent into Lanka Sutra, 3rd century CE), integrating Tathāgatagarbha and Yogachara.

A similar and related sutra which synthesizes Buddha-nature with Yogacara is the Ghanavyūha Sūtra.Brunnholzl, Karl (2014). When the Clouds Part, The Uttaratantra and Its Meditative Tradition as a Bridge between Sutra and Tantra, pp. 38-41. Boston & London: Snow Lion.

In the Tibetan tradition Karl Brunnhölzl, drawing on the Tibetan tradition, provides the following list of 24 sutras "explicitly or implicitly associated with tathagatagarbha":Brunnholzl, Karl (2014). When the Clouds Part, The Uttaratantra and Its Meditative Tradition as a Bridge between Sutra and Tantra, p. 11. Boston & London: Snow Lion.

Tathāgatagarbhasūtra Anūnatvāpurnatvanirdeśa Śrīmālādevī Siṃhanādasūtra Dharanisvararajasutra Mahāyānamahāparinirvāṇasūtra Aṅgulimālīyasūtra Mahābherīsūtra Laṅkāvatārasūtra Tathāgatagunajñanacintyavisayavataranirdesasutra SarvaBuddhavisayavatarajñanalokalamkarasutra Ratnadārikāsūtra Mahāmeghasūtra Abhidharmamahāyānasūtra Sthirādhyāsayaparivartasūtra Avikalpapravesadharani Sunyatanamamahasutra Buddhāvataṃsakasūtra Ratnakuta Suvarnaprabhasottamasutra Saṃdhinirmocanasūtra Gaganagañjaparipṛcchsūtra Sāgaramatiparipṛcchāsūtra Prasantaviniscayapratiharyanamasamadhisutra Candrapradipasutra

Overview of major sutras

Tathāgatagarbha Sūtra (200-250 CE)

The Tathāgatagarbha Sūtra presents the tathāgatagarbha as a virtual Buddha-homunculus, a fully wisdom-endowed Buddha, "a most victorious body ... great and indestructible", inviolate, seated majestically in the lotus position within the body of each being, clearly visible only to a perfect Buddha with his supernatural vision. This is the most "personalist" depiction of the tathāgatagarbha encountered in any of the chief Tathāgatagarbha sutras and is imagistically reminiscent of Mahāyāna descriptions of the Buddha himself sitting in the lotus posture within his own mother's womb prior to birth: "luminous, glorious, gracious, beautiful to see, seated with his legs crossed" and shining "like pure gold ..."Lalita Vistara Sutra, "Voice of Buddha", Dharma Publishing, 1983, p.109

Śrīmālādevī Siṃhanāda Sūtra (2nd century CE)

Some of the earliest and most important Tathāgatagarbha sūtras have been associated by scholars with certain early Buddhist schools in India.

Brian Edward Brown dates the composition of the Śrīmālādevī Siṃhanāda Sūtra to the Andhra Ikshvaku in the 3rd century CE, as a product of the Mahāsāṃghikas of the Āndhra region. Wayman has outlined eleven points of complete agreement between the Mahāsāṃghikas and the Śrīmālā, along with four major arguments for this association.

Sree Padma and Anthony Barber also associate the earlier development of the Tathāgatagarbha Sūtra with the Mahāsāṃghikas, and conclude that the Mahāsāṃghikas of the Āndhra region were responsible for the inception of the Tathāgatagarbha doctrine. According to the Śrīmālādevī Siṃhanāda Sūtra, the tathāgatagarbha is "not born, does not die, does not transfer, does not arise. It is beyond the sphere of the characteristics of the compounded; it is permanent, stable and changeless."The Shrimaladevi Sutra Moreover, it has been described as "the sphere of experience of the Tathāgatas [Buddhas]."

Mahāyāna Mahāparinirvāṇa Sūtra (c. 200 CE)

The Nirvana Sutra is an eschatological text. Its core was written in India in a time which was perceived as the age in which the Buddha-dharma would perish, and all the Mahayana sutras disappear. The sutra responds to this awaited end with the proclamation of the tathagatagarbha, the innate Buddhahood present in all man.

According to Sallie B. King, the Mahaparinirvana Sutra does not represent a major innovation, and is rather unsystematic, which made it "a fruitful one for later students and commentators, who were obliged to create their own order and bring it to the text". According to King, its most important innovation is the linking of the term Buddhadhātu with tathāgatagarbha.

Buddhadhātu, "Buddha-nature", "the nature of the Buddha", that what constitutes a Buddha, is a central topic of the Nirvana sutra. According to Sally King, the sutra speaks about Buddha-nature in so many different ways, that Chinese scholars created a list of types of Buddha-nature that could be found in the text. The "nature of the Buddha" is presented as a timeless, eternal "Self", which is akin to the tathāgatagarbha, the innate possibility in every sentient being to attain Buddhahood and manifest this timeless Buddha-nature. This "hidden treasury" is present in all sentient beings:

This does not mean that sentient beings are at present endowed with the qualities of a Buddha, but that they will have those qualities in the future. It is obscured from worldly vision by the screening effect of kleshas, tenacious negative mental afflictions. The most notable of which are greed, hatred, delusion, and pride. Once these negative mental states have been eliminated, however, the Buddhadhātu is said to shine forth unimpededly and the Buddhadhātu can then be consciously "entered into", and therewith deathless Nirvana attained:

Anunatva Apurnatva Nirdeśa

The development of the Buddha-nature doctrine is closely related to that of Buddha-matrix (Sanskrit: tathāgatagarbha). In the Anunatva-Apurnatva-Nirdesa, the Buddha links the tathāgatagarbha to the Dharmadhātu (ultimate, all-equal, uncreated essence of all phenomena) and to essential being, stating: "What I call "be-ing" (sattva) is just a different name for this permanent, stable, pure and unchanging refuge that is free from arising and cessation, the inconceivable pure Dharmadhatu."言眾生者即是不生不滅常恒清涼不變歸依。不可思議清淨法界等異名。T668.477c08

Angulimaliya Sūtra

Every being has Buddha-nature (Buddha-dhatu). It is indicated in the Aṅgulimālīya Sūtra that if the Buddhas themselves were to try to find any sentient being who lacked the Buddha-nature, they would fail. In fact, it is stated in this sutra that the Buddhas do discern the presence of the everlasting Buddha-nature in every being:

Belief and faith in the true reality of the tathāgatagarbha is presented by the relevant scriptures as a positive mental act and is strongly urged; indeed, rejection of the tathāgatagarbha is linked with highly adverse karmic consequences. In the Angulimaliya Sutra it is stated that teaching only non-self and dismissing the reality of the tathāgatagarbha karmically lead one into most unpleasant rebirths, whereas spreading the doctrine of the tathāgatagarbha will bring benefit both to oneself and to the world.

Laṅkāvatāra Sūtra (3rd century CE)

The later Laṅkāvatāra Sūtra presents the tathāgatagarbha as being a teaching completely consistent with and identical to emptiness. It synthesizes tathāgatagarbha with the emptiness (śūnyatā) of the prajñāpāramitā sutras. Emptiness is the thought-transcending realm of non-duality and unconditionedness: complete freedom from all constriction and limitation.

The Laṅkāvatāra Sūtra describes the tathāgatagarbha as "by nature brightly shining and pure," and "originally pure," though "enveloped in the garments of the skandhas, dhātus and ayatanas and soiled with the dirt of attachment, hatred, delusion and false imagining." It is said to be "naturally pure," but it appears impure as it is stained by adventitious defilements. Thus the Laṅkāvatāra Sūtra identifies the luminous mind of the canon with the tathāgatagarbha.

It also equates the tathāgatagarbha (and ālaya-vijñāna) with nirvana, though this is concerned with the actual attainment of nirvana as opposed to nirvana as a timeless phenomenon.

In the later Laṅkāvatāra Sūtra it is said that the tathāgatagarbha might be mistaken for a self, which it is not. In fact, the sutra states that it is identical to the teaching of no-self.

In Section XXVIII of the Laṅkāvatāra Sūtra, Mahāmati asks Buddha, "Is not this Tathagata-garbha taught by the Blessed One the same as the ego-substance taught by the philosophers?" The Buddha's response: