Madhyamaka in the context of Chữ Nôm

Zen (Japanese pronunciation: [dzeꜜɴ, dzeɴ]; from Chinese: Chan; in Korean: Sŏn, and Vietnamese: Thiền) is a Mahayana Buddhist tradition that developed in China during the Tang dynasty by blending Indian Mahayana Buddhism, particularly Yogacara and Madhyamaka philosophies, with Chinese Taoist thought, especially Neo-Daoist. Zen originated as the Chan school (禪宗, Chanzōng, 'meditation school') or the Buddha-mind school (佛心宗, fóxīnzōng), and later developed into various sub-schools and branches.

Chan is traditionally believed to have been brought to China by the semi-legendary figure Bodhidharma, an Indian (or Central Asian) monk who is said to have introduced dhyana teachings to China. From China, Chan spread south to Vietnam and became Vietnamese Thiền, northeast to Korea to become Seon Buddhism, and east to Japan, becoming Japanese Zen.

Nondualism, also called nonduality and sometimes monism, is a polyvalent term originating in Indian philosophy and religion, where it is used in various, related contemplative philosophies which aim to negate dualistic thinking or conceptual proliferation (prapanca) and thereby realize nondual awareness, 'that which is beyond discursive thinking', a state of consciousness described in contemplative traditions as a background field of unified, immutable awareness that exists prior to conceptual thought.

The English term "nonduality" is derived from the Sanskrit Hindu term "advaita" (अद्वैत), "not-two" or "one without a second," meaning that only Brahman, 'the one', is ultimately real while 'the world', or the multiplicity of thought-constructs, 'the second', is not fully real; and from the Buddhist term advaya, which is also literally translated as "not two" and has various applications, including the Madhyamaka negation of thinking in opposites such as ordinary, conventional truth versus ultimate truth, and in Yogachara the deconstruction of the "apprehension of sensory objects as separate from the perceiving consciousness."

Mahayana is the largest branch of Buddhism, followed by Theravada. It is a broad group of Buddhist traditions, texts, philosophies, and practices developed in ancient India (c. 1st century BCE onwards). Mahāyāna accepts the main scriptures and teachings of early Buddhism but also recognizes various doctrines and texts that are not accepted by Theravada Buddhism as original. These include the Mahāyāna sūtras and their emphasis on the bodhisattva path and Prajñāpāramitā. Vajrayana or Mantra traditions are a subset of Mahāyāna which makes use of numerous Tantric methods Vajrayānists consider to help achieve Buddhahood.

Mahāyāna also refers to the path of the bodhisattva striving to become a fully awakened Buddha for the benefit of all sentient beings, and is thus also called the "Bodhisattva Vehicle" (Bodhisattvayāna). Mahāyāna Buddhism generally sees the goal of becoming a Buddha through the bodhisattva path as being available to all and sees the state of the arhat as incomplete. Mahāyāna also includes numerous Buddhas and bodhisattvas that are not found in Theravada (such as Amitābha and Vairocana). Mahāyāna Buddhist philosophy also promotes unique theories, such as the Madhyamaka theory of emptiness (śūnyatā), the Vijñānavāda ("the doctrine of consciousness" also called "mind-only"), and the Buddha-nature teaching.

The Aṣṭasāhasrikā Prajñāpāramitā Sūtra (Sanskrit: अष्टसाहस्रिका प्रज्ञापारमिता सूत्र; English: The Perfection of Wisdom in Eight Thousand [Lines]) is a Mahāyāna Buddhist sūtra in the category of Prajñāpāramitā sūtra literature. The sūtra's manuscript witnesses date to at least c. 184 BCE – c. 46 BCE, making it among the oldest Buddhist manuscripts in existence. The sūtra forms the basis for the expansion and development of the Prajñāpāramitā sūtra literature. In terms of its influence in the development of Buddhist philosophical thought, P.L. Vaidya writes that "all Buddhist writers from Nāgārjuna, Āryadeva, Maitreyanātha, Asaṅga, Vasubandhu, Dignāga, down to Haribhadra concentrated their energies in interpreting Aṣṭasāhasrikā only," making it of great significance in the development of Madhyāmaka and Yogācāra thought.

The sūtra deals with a number of topics, but is primarily concerned with the conduct of a bodhisattva, the realisation and attainment of the Perfection of Wisdom as one of the Six Perfections, the realisation of thusness (tathātā), the attainment of irreversibility on the path to buddhahood (avaivartika), non-conceptualisation and abandonment of views, as well as the worldly and spiritual benefit of worshipping the sūtra.

Yogachara (Sanskrit: योगाचार, IAST: Yogācāra) is an influential tradition of Buddhist philosophy and psychology emphasizing the study of cognition, perception, and consciousness through the interior lens of meditation, as well as philosophical reasoning (hetuvidyā). Yogachara was one of the two most influential traditions of Mahayana Buddhism in India, along with Madhyamaka.

The compound Yogācāra literally means "practice of yoga", or "one whose practice is yoga", hence the name of the school is literally "the school of the yogins". Yogācāra was also variously termed Vijñānavāda (the doctrine of consciousness), Vijñaptivāda (the doctrine of ideas or percepts) or Vijñaptimātratā-vāda (the doctrine of 'mere representation'), which is also the name given to its major theory of mind which seeks to deconstruct how we perceive the world. There are several interpretations of this main theory: various forms of Idealism, as well as a phenomenology or representationalism. Aside from this, Yogācāra also developed an elaborate analysis of consciousness (vijñana) and mental phenomena (dharmas), as well as an extensive system of Buddhist spiritual practice, i.e. yoga.

The Buddhist doctrine of the two truths (Sanskrit: dvasatya, Wylie: bden pa gnyis) differentiates between two levels of satya (Sanskrit; Pāli: sacca; meaning "truth" or "reality") in the teaching of Śākyamuni Buddha: the "conventional" or "provisional" (saṁvṛti) truth, and the "absolute" or "ultimate" (paramārtha) truth.

The exact meaning varies between the various Buddhist schools and traditions. The best known interpretation is from the Mādhyamaka school of Mahāyāna Buddhism, whose founder was the 3rd-century Indian Buddhist monk and philosopher Nāgārjuna. For Nāgārjuna, the two truths are epistemological truths. The phenomenal world is accorded a provisional existence. The character of the phenomenal world is declared to be neither real nor unreal, but logically indeterminable. Ultimately, all phenomena are empty (śūnyatā) of an inherent self or essence due to the non-existence of the self (anātman), but temporarily exist depending on other phenomena (pratītya-samutpāda).

Tiantai or T'ien-t'ai (Chinese: 天台; pinyin: PRC Standard Mandarin:Tiāntāi) is an East Asian Buddhist school of Mahāyāna Buddhism that developed in 6th-century China. Drawing from earlier Mahāyāna sources such as Madhyamaka, founded by Nāgārjuna, who is traditionally regarded as the first patriarch of the school, Tiantai Buddhism emphasizes the "One Vehicle" (Ekayāna) doctrine derived from the influential Lotus Sūtra, as well as the philosophy of its fourth patriarch, Zhiyi (538–597 CE), the principal founder of the tradition. Brook Ziporyn, professor of ancient and medieval Chinese religion and philosophy, states that Tiantai Buddhism is "the earliest attempt at a thoroughgoing Sinitic reworking of the Indian Buddhist tradition." According to Paul Swanson, scholar of Buddhist studies, Tiantai Buddhism grew to become "one of the most influential Buddhist traditions in China and Japan."

Tiantai is sometimes also called "The Dharma Flower School" (天台法華宗), after its focus on the Lotus Sūtra, whose Chinese title translates to "Subtle Dharma Lotus Flower Sutra". During the Sui dynasty (581–618), the Tiantai school became one of the leading schools of Chinese Buddhism, with numerous large temples supported by emperors and wealthy patrons. The school's influence waned and was revived again in the Tang by figures like Zhanran, experiencing a second revival period during the Song dynasty. Chinese Tiantai remains a living tradition to this day, being particularly strong in Hong Kong and Zhejiang Province.

Prajñāpāramitā means "the Perfection of Wisdom" or "Transcendental Knowledge" in Mahāyāna. Prajñāpāramitā refers to a perfected way of seeing the nature of reality, as well as to a particular body of Mahāyāna scriptures (sūtras), known as the Prajñāpāramitā sutras, which includes such texts as the Heart Sutra and Diamond Sutra.

The word Prajñāpāramitā combines the Sanskrit words prajñā "wisdom" (or "knowledge") with pāramitā, "excellence," "perfection," "noble character quality," or "that which has gone beyond," "gone to the other side," "transcending." Prajñāpāramitā is a central concept in Mahāyāna Buddhism and is generally associated with ideas such as emptiness (śūnyatā), 'lack of svabhāva' (essence), the illusory (māyā) nature of things, how all phenomena are characterized by "non-arising" (anutpāda, i.e. unborn) and the Madhyamaka thought of Nāgārjuna. Its practice and understanding are taken to be indispensable elements of the Bodhisattva path.

Tsongkhapa (Tibetan: ཙོང་ཁ་པ་, [tsoŋˈkʰapa], meaning: "the man from Tsongkha" or "the Man from Onion Valley", c. 1357–1419) was an influential Tibetan Buddhist monk, philosopher and tantric yogi, whose activities led to the formation of the Gelug school of Tibetan Buddhism.

His philosophical works are a grand synthesis of the Buddhist epistemological tradition of Dignāga and Dharmakīrti, the Cittamatra philosophy of the mind, and the madhyamaka philosophy of Nāgārjuna and Candrakīrti.

The Kadam school (Tibetan: བཀའ་གདམས་པ་, Wylie: bka' gdams pa) of Tibetan Buddhism, or Kadampa was an 11th century Buddhist tradition founded by the great Bengali master Atiśa (982–1054) and his students including Dromtön (1005–1064), a Tibetan Buddhist lay master. The Kadampa stressed compassion, pure discipline and study. By the 15th century, Tsongkapa is credited with synthesizing and folding Kadampa lineages into the Gelug school.

The most evident teachings of that tradition were the graduated teachings on the Mahayana path. These special presentations became known as lojong (mind training) and lamrim (stages of the path). Kadam masters like Atiśa also promoted the study of madhyamaka philosophy. According to Ronald M. Davidson, "Atiśa's coming to Tibet in 1042 was the threshold moment in the efflorescence of Buddhism and provided a stable foundation for monastic scholarship for the next thousand years."

Qin, known in historiography as the Later Qin (simplified Chinese: 后秦; traditional Chinese: 後秦; pinyin: Hòuqín; 384–417) or Yao Qin (姚秦), was a dynastic state of China ruled by the Yao clan of Qiang ethnicity during the Sixteen Kingdoms period in northern China. As the only Qiang-led state among the Sixteen Kingdoms, it was most known for its propagation of Buddhism under its second ruler, Yao Xing, who sponsored the Madhyamakin monk, Kumārajīva to translate Sanskrit Buddhist text into Chinese.

All rulers of the Later Qin declared themselves emperors, but for a substantial part of Yao Xing's reign, he used the title Heavenly King. Historiographers gave the state the prefix of "Later" to distinguish it with the Former Qin and Western Qin as it was founded during the Former Qin's collapse after the Battle of Fei River and went on to conquer the Former Qin's power base in the Guanzhong. With Chang'an as its capital, the Later Qin also controlled Henan and vassalised the Western Qin, the four Liangs (Later, Southern, Northern and Western), Southern Yan, Qiao Shu, Chouchi and various tribes of the Ordos region.