There are two main sources of Indian Buddhist discussions of emptiness: the
Mahayana sutra literature, which is traditionally believed to be the word of the Buddha in Mahayana Buddhism, and the shastra literature, which was composed by Buddhist scholars and philosophers.
Prajñāpāramitā sūtras . The
Prajñāpāramitā (Perfection of Wisdom) Sutras taught that all entities, including
dharmas, are empty of self, essential core, or intrinsic nature (
svabhava), being only conceptual existents or constructs. The notion of
prajña (wisdom, knowledge) presented in these sutras is a deep non-conceptual understanding of emptiness. The Prajñāpāramitā sutras also use various metaphors to explain the nature of things as emptiness, stating that things are like "illusions" (
māyā) and "dreams" (
svapna). The
Astasahasrika Prajñaparamita, possibly the earliest of these sutras
, states: If he knows the five aggregates as like an illusion, But makes not illusion one thing, and the aggregates another; If, freed from the notion of multiple things, he courses in peace— Then that is his practice of wisdom, the highest perfection. The
Vajracchedikā Prajñāpāramitā Sūtra adds the following similes to describe how all conditioned things are to be contemplated: like a bubble, a shadow, like dew or a flash of lightning. In the worldview of these sutras, though we perceive a world of concrete and discrete objects, these objects are "empty" of the identity imputed by their designated labels. In that sense, they are deceptive and like an illusion. The Perfection of Wisdom texts constantly repeat that nothing can be found to ultimately exist in some fundamental way. This applies even to the highest Buddhist concepts (
bodhisattvas,
bodhicitta, and even
prajña itself). Even
nirvana itself is said to be empty and like a dream or magical illusion. In a famous passage, the
Heart sutra, a later but influential
Prajñāpāramitā text, directly states that the
five skandhas (along with the five senses, the mind, and the four noble truths) are said to be "empty" (
sunya):In the Prajñāpāramitā sutras the knowledge of emptiness, i.e.
prajñāpāramitā is said to be the fundamental virtue of the bodhisattva, who is said to stand on emptiness by not standing (-stha) on any other dharma (phenomena). Bodhisattvas who practice this perfection of wisdom are said to have several qualities such as the "not taking up" (
aparigṛhīta) and non-apprehension (
anupalabdhi) of anything, non-attainment (
aprapti), not-settling down (
anabhinivesa) and not relying on any signs (
nimitta, mental impressions). Bodhisattvas are also said to be free of fear in the face of the ontological groundlessness of the emptiness doctrine which can easily shock others.
Mādhyamaka school and
Āryadeva, two classic
Indian philosophers of the Buddhist emptiness doctrine
Mādhyamaka is a
Mahāyāna Buddhist school of philosophy which focuses on the analysis of emptiness, and was thus also known as
śūnyatavāda. The school is traditionally seen as being founded by the Indian Buddhist philosopher
Nāgārjuna.
Nāgārjuna's goal was to refute the
essentialism of certain
Abhidharma schools and the Hindu
Nyaya school. His best-known work is the
Mūlamadhyamakakārikā (MMK), in which he used
reductio arguments (
Skt:
prasanga) to show the non-substantiality of everything.
Nāgārjuna equated the emptiness of
dharmas with their
dependent origination, and thus with their being devoid any permanent substance or primary, substantial existence (
svabhava).
Nāgārjuna writes in the MMK: We state that conditioned origination is emptiness. It is mere designation depending on something, and it is the middle path. (24.18) Since nothing has arisen without depending on something, there is nothing that is not empty. (24.19) Nāgārjuna's Mādhyamaka states that since things have the nature of lacking true existence or own being (
niḥsvabhāva), all things are mere conceptual constructs (
prajñaptimatra) because they are just impermanent collections of causes and conditions. Because of this, Mādhyamaka is also known as
Niḥsvabhāvavāda. This also applies to the principle of causality itself, since
everything is dependently originated. If one is unaware of this, things may seem to arise as existents, remain for a time and then subsequently perish. In reality, dependently originated phenomena do not arise or remain as inherently existent phenomena and yet they still appear as a flow of conceptual constructs.'dzin-pa
) and the perceived object ("grasped", Skt: grāhya,
Tib: bzhung-ba
)." This is seen in the following quote from the Madhyāntavibhāga:
There exists the imagination of the unreal, there is no duality, but there is emptiness, even in this there is that. The Śrīmālā Sūtra
posits that the Buddha-nature is ultimately identifiable as the supramundane nature of the Buddha, the garbha
is the ground for Buddha-nature, this nature is unborn and undying, has ultimate existence, has no beginning nor end, is nondual, and permanent. The text also adds that the garbha'' has "no self, soul or personality" and "incomprehensible to anyone distracted by sunyata (voidness)"; rather it is the support for phenomenal existence. The notion of Buddha-nature and its interpretation was and continues to be widely debated in all schools of
Mahayana Buddhism. Some traditions interpret the doctrine to be equivalent to emptiness (like the Tibetan
Gelug school); the positive language of the texts
Tathāgatagarbha sutras are then interpreted as being of provisional meaning, and not ultimately true. Other schools, however (mainly the
Jonang school), see
Tathāgatagarbha as being an ultimate teaching and see it as an eternal, true self, while
Śūnyatā is seen as a provisional, lower teaching. Likewise, western scholars have been divided in their interpretation of the
Tathāgatagarbha, since the doctrine of an 'essential nature' in every living being appears to be confusing, since it seems to be equivalent to a 'Self', which seems to contradict the doctrines in a vast majority of Buddhist texts. Some scholars, however, view such teachings as metaphorical, not to be taken literally. According to some scholars, the Buddha-nature which these sutras discuss does not represent a substantial self (
ātman). Rather, it is a positive expression of emptiness, and represents the potentiality to realize Buddhahood through Buddhist practices. In this view, the intention of the teaching of Buddha-nature is soteriological rather than theoretical. According to others, the potential of salvation depends on the ontological reality of a salvific, abiding core reality – the Buddha-nature, empty of all mutability and error, fully present within all beings. Japanese scholars of the "
Critical Buddhism" movement meanwhile see Buddha-nature as an
essentialist and thus an un-Buddhist idea. which is associated with
openness and
freedom.In
Tibetan Buddhism, emptiness (
Wylie:
stong-pa nyid) is mainly interpreted through the lens of
Mādhyamaka philosophy, though the
Yogacara- and
Tathāgatagarbha-influenced interpretations are also influential. The interpretations of the Indian
Mādhyamaka philosopher
Candrakīrti are the dominant views on emptiness in Tibetan Buddhist philosophy. In Tibet, a distinction also began to be made between the autonomist (
svātantrika, rang rgyud pa) and consequentialist (''
prāsaṅgika, thal 'gyur pa'') approaches to
Mādhyamaka reasoning about emptiness. The distinction was invented by Tibetan scholarship, and not one made by classical Indian Madhyamikas. Further Tibetan philosophical developments began in response to the works of the influential scholar
Dolpopa (1292–1361) and led to two distinctly opposed Tibetan
Mādhyamaka views on the nature of emptiness and ultimate reality. One of these is the view termed
shentong (
Wylie:
gzhan stong, 'other empty'), which is a further development of Indian
Yogacara-Madhyamaka and the Buddha-nature teachings by
Dolpopa, and is primarily promoted in the
Jonang,
Nyingma, and modern
Kagyu schools. This view states that ultimate reality is empty of the conventional, but it is itself
not empty of being ultimate
Buddhahood and the
luminous nature of mind. Dolpopa considered his view a form of
Mādhyamaka, and called his system "Great
Mādhyamaka". In
Jonang, this ultimate reality is a "ground or substratum" which is "uncreated and indestructible, noncomposite and beyond the chain of dependent origination."
Dolpopa was roundly critiqued for his claims about emptiness and his view that they were a kind of
Mādhyamaka. His critics include Tibetan philosophers such as the founder of the
Gelug school
Je Tsongkhapa (1357–1419) and
Mikyö Dorje, the 8th Karmapa of the Karma Kagyu (1507–1554).
Rangtong (
Wylie:
rang stong; 'self-empty') refers to views which oppose
shentong and state that ultimate reality is that which is empty of self-nature in a relative and absolute sense; that is to say ultimate reality is empty of everything, including itself. It is thus not a transcendental ground or metaphysical
absolute, but just the absence of true existence (
svabhava). This view has sometimes been applied to the
Gelug school because they tend to hold that emptiness is "an absolute negation" (
med dgag). However, many Tibetan philosophers reject these terms as descriptions of their views on emptiness. The
Sakya thinker
Gorampa Sonam Senge (1429–1489), for example, called his version of
Mādhyamaka, "freedom from extremes" or "freedom from proliferations" (
spros bral) and claimed that the ultimate truth was ineffable, beyond predication or concept. For Gorampa, emptiness is not just the absence of inherent existence, but it is the absence of the four extremes in all phenomena i.e. existence, nonexistence, both and neither (see:
catuskoti). The
14th Dalai Lama, who generally speaks from the
Gelug perspective, states:
Chinese Buddhism Sānlùn school When Buddhism was introduced in China it was initially understood in terms of indigenous Chinese philosophical culture. Because of this, emptiness (
Ch.,
kong, 空;) was at first understood as pointing to a kind of transcendental reality similar to the
Tao. It took several centuries to realize that
śūnyatā does not refer to an essential transcendental reality underneath or behind the world of appearances.
Chinese Mādhyamaka (known as
Sānlùn, or the "three treatise school") began with the work of
Kumārajīva (344–413 CE) who translated the works of Nāgārjuna into Chinese.
Sānlùn figures like Kumārajīva's pupil
Sengzhao (384–414), and the later
Jizang (549–623) were influential in introducing a more orthodox and non-essentialist interpretation of emptiness to Chinese Buddhism. Sengzhao argues, for example, that the nature of phenomena could not be said to be either existent or non-existent and that it was necessary to go beyond conceptual proliferation to realize emptiness.
Jizang (549–623) was another central figure in Chinese Madhyamaka who wrote numerous commentaries on Nāgārjuna and
Aryadeva and is considered to be the leading representative of the school.
Jizang called his method "deconstructing what is misleading and revealing what is corrective". He insisted that one must never settle on any particular viewpoint or perspective but constantly reexamine one's formulations to avoid
reifications of thought and behavior.
Tiantai and Huayan Later Chinese philosophers developed their own unique interpretations of emptiness. One of these was
Zhiyi, the intellectual founder of the
Tiantai school, who was strongly influenced by the
Lotus sutra. The Tiantai view of emptiness and
dependent origination is inseparable from their view of the "interfusion of phenomena" and the idea that the ultimate reality is an absolute totality of all particular things which are "Neither-Same-Nor-Different" from each other. In Tiantai metaphysics, every event, function, or characteristic is the product of the interfusion of all others, the whole is in the particular and every particular event/function is also in every other particular. This also leads to the conclusion that all phenomena are "findable" in each and every other phenomena, even seemingly conflicting phenomena such as good and evil or delusion and enlightenment are interfused with each other. The
Huayan school understood emptiness and ultimate reality through the similar idea of
interpenetration or "coalescence" (Wylie: ''zung-'jug
; Sanskrit: yuganaddha''), using the concept of
Indra's net to illustrate this.
Chán Chan Buddhism was influenced by all the previous Chinese Buddhist currents. The
Mādhyamaka of Sengzhao, for example, influenced the views of the Chan patriarch
Shen Hui (670–762), a critical figure in the development of Chan, as can be seen by his "Illuminating the Essential Doctrine" (
Hsie Tsung Chi). This text emphasizes that true emptiness or
Suchness cannot be known through
thought since it is free from thought (
wu-nien). Shen Hui also states that true emptiness is not nothing, but it is a "Subtle Existence" (
miao-yu), which is just "Great
Prajña." "Vast and far-reaching without boundary, secluded and pure, manifesting light, this spirit is without obstruction. Its brightness does not shine out but can be called empty and inherently radiant. Its brightness, inherently purifying, transcends causal conditions beyond subject and object. Subtle but preserved, illumined and vast, also it cannot be spoken of as being or nonbeing, or discussed with images or calculations. Right in here the central pivot turns, the gateway opens. You accord and respond without laboring and accomplish without hindrance. Everywhere turn around freely, not following conditions, not falling into classifications. Facing everything, let go and attain stability. Stay with that just as that. Stay with this just as this. That and this are mixed together with no discriminations as to their places. So, it is said that the earth lifts up the mountain without knowing the mountain's stark steepness. A rock contains jade without knowing the jade's flawlessness. This is how truly to leave home, how home-leaving must be enacted."
Western Buddhism Various western Buddhists note that
Śūnyatā refers to the emptiness of inherent existence, as in Madhyamaka; but also to the emptiness of mind or awareness, as open space and the "ground of being," as in meditation-orientated traditions and approaches such as Dzogchen and
Shentong. ==Hinduism==