Theravada in the context of Satipatthana Sutta

In Buddhism, refuge or taking refuge refers to a religious practice which often includes a prayer or recitation performed at the beginning of the day or of a practice session. Its object is typically the Three Jewels (also known as the Triple Gem, Three Treasures, or Three Refuges, Pali: ti-ratana or ratana-ttaya; Sanskrit: tri-ratna or ratna-traya), which are the Buddha, the Dharma, and the Sangha. Taking refuge is a form of aspiration to lead a life with the Triple Gem at its core. In early Buddhist scriptures, taking refuge is an expression of determination to follow the Buddha's path, but not a relinquishing of responsibility. Refuge is common to all major schools of Buddhism.

Since the period of Early Buddhism, all Theravada and mainstream Mahayana schools only take refuge in the Triple Gem. However, the Vajrayana school includes an expanded refuge formula known as the Three Jewels and Three Roots.

Buddhist monasticism is one of the earliest surviving forms of organized monasticism and one of the fundamental institutions of Buddhism. Monks and nuns, called bhikkhu (Pali, Skt. bhikshu) and bhikkhuni (Skt. bhikshuni), are responsible for the preservation and dissemination of the Buddha's teaching and the guidance of Buddhist lay people. Three surviving traditions of monastic discipline (Vinaya), govern modern monastic life in different regional traditions: Theravada (Sri Lanka and Southeast Asia), Dharmaguptaka (East Asia), and Mulasarvastivada (Tibet and the Himalayan region).

In Buddhism, a bodhisattva is a person who has attained, or is striving towards, bodhi ('awakening', 'enlightenment') or Buddhahood. Often, the term specifically refers to a person who forgoes or delays personal nirvana or bodhi in order to compassionately help other individuals reach Buddhahood.

In the Early Buddhist schools, as well as modern Theravāda Buddhism, bodhisattva (or bodhisatta) refers to someone who has made a resolution to become a Buddha and has also received a confirmation or prediction from a living Buddha that this will come to pass. In Theravāda Buddhism, the bodhisattva is mainly seen as an exceptional and rare individual. Only a few select individuals are ultimately able to become bodhisattvas, such as Maitreya.

Buddhism is an ancient Indian religion, which arose in and around the ancient Kingdom of Magadha (now Bihar, India). It is based on the teachings of Gautama Buddha, who lived in the 6th or 5th century BCE and was deemed a "Buddha" or an "Awakened One". Buddhist records in the Theravada tradition list Gautama Buddha as the fourth Buddha of our kalpa, while the next buddha will be Maitreya Buddha. Buddhism spread outside of Northern India beginning in the Buddha's lifetime.

In the 3rd century BCE and during the reign of the Mauryan Emperor Ashoka, the Buddhist community split into two schools: the Mahāsāṃghika and the Sthaviravāda, each of which spread throughout India and grew into numerous sub-schools. In modern times, three major branches of Buddhism exist: the Theravada in Sri Lanka and Southeast Asia, and the Mahayana in the Himalayas and East Asia, and the Vajrayana throughout Asia and specifically in Tibet, Nepal, and Bhutan.

Prajñā (प्रज्ञा) or paññā (𑀧𑀜𑁆𑀜𑀸) is a Buddhist term often translated as "wisdom", "transcendental wisdom", "insight", "intelligence", or "understanding". It is described in Buddhist texts as the understanding of the true nature of phenomena. In the context of Buddhist meditation, it is the ability to understand the three characteristics of all things: anicca ("impermanence"), dukkha ("dissatisfaction" or "suffering"), and anattā ("non-self" or "egolessness"). Mahāyāna texts describe it as the understanding of śūnyatā ("emptiness"). It is part of the Threefold Training in Buddhism, and is one of the ten pāramīs of Theravāda Buddhism and one of the six Mahāyāna pāramitās.

In the Buddhist tradition, the five hindrances (Sinhala: පඤ්ච නීවරණ, romanized: pañca nīvaraṇa; Pali: pañca nīvaraṇāni) are identified as mental factors that hinder progress in meditation and in daily life. In the Theravada tradition, these factors are identified specifically as obstacles to the jhānas (stages of concentration) within meditation practice. Contemporary Insight Meditation teachers identify the five hindrances as obstacles to mindfulness meditation.

Within the Mahayana tradition, the five hindrances are obstacles to samadhi. They are part of the two types of obstructions (Sanskrit: āvaraṇa), i.e. the obstacles to Buddhahood. The two types of obstructions are afflictive obstructions (Sanskrit: kleśāvaraṇa, which include the standard five hindrances) and cognitive obstructions (jñeyāvaraṇa, which can only be removed by bodhisattvas).

The schools of Buddhism are the various institutional and doctrinal divisions of Buddhism, which have often been based on historical sectarianism and the differing teachings and interpretations of specific Buddhist texts. The branching of Buddhism into separate schools has been occurring from ancient times up to the present. The classification and nature of the various doctrinal, philosophical or cultural facets of the schools of Buddhism is vague and has been interpreted in many different ways, often due to the sheer number (perhaps thousands) of different sects, sub-sects, movements, etc. that have made up or currently make up the whole of the Buddhist tradition. The sectarian and conceptual divisions of Buddhist thought are part of the modern framework of Buddhist studies, as well as comparative religion in Asia. Some factors in Buddhist doctrine appear to be consistent across different schools, such as the afterlife and the Buddha, while others vary considerably.

From a largely English-language standpoint, and to some extent in most of Western academia, Buddhism is separated into two groups: Theravāda (lit. 'the Teaching of the Elders' or 'the Ancient Teaching'), and Mahāyāna (lit. 'the Great Vehicle'). The most common classification among scholars is threefold: Theravāda, Mahāyāna and Vajrayāna.

The Khmer people (Khmer: ជនជាតិខ្មែរ, UNGEGN: Chônchéatĕ Khmêr, ALA-LC: Janajāti Khmaer [cɔn.ciət kʰmae]) are an ethnic group native to Cambodia. They comprise over 95% of Cambodia's population of 17 million. They speak the Khmer language, which is part of the larger Austroasiatic language family alongside Mon and Vietnamese.

The majority of Khmer people follow Theravada Buddhism. Significant populations of Khmers reside in neighboring regions, including Northern Khmer communities in adjacent areas of Thailand and Khmer Krom communities in the Mekong Delta region of Vietnam. There are nearly one million Khmers in other diaspora communities, living mainly in the United States, France, and Australia.

Sinhala (/ˈsɪnhələ, ˈsɪŋələ/ SIN-hə-lə, SING-ə-lə; Sinhala: සිංහල, siṁhala, [ˈsiŋɦələ]), sometimes called Sinhalese (/ˌsɪn(h)əˈliːz, ˌsɪŋ(ɡ)əˈliːz/ SIN-(h)ə-LEEZ, SING-(g)ə-LEEZ), is an Indo-Aryan language primarily spoken by the Sinhalese people of Sri Lanka, who make up the largest ethnic group on the island, numbering about 16 million. It is also the first language of about 2 million other Sri Lankans, as of 2001. It is written in the Sinhalese script, a Brahmic script closely related to the Grantha script of South India. The language has two main varieties, written and spoken, and is a notable example of the linguistic phenomenon known as diglossia.

Sinhala is one of the official and national languages of Sri Lanka. Along with Pali, it played a major role in the development of Theravada Buddhist literature.

The Sinhalese people (Sinhala: සිංහල ජනතාව, romanized: Sinhala Janathāva), also known as the Sinhalese or Sinhala people, are an Indo-Aryan ethno-linguistic group native to the island of Sri Lanka. They are the largest ethnic group in Sri Lanka, constituting about 75% of the Sri Lankan population and number more than 15.2 million.

The Sinhalese people speak Sinhala, an insular Indo-Aryan language. Sinhalese people are predominantly Theravada Buddhists, although a significant minority of Sinhalese follow branches of Christianity and other religions. Since 1815, Sinhalese people were broadly divided into two subgroups: the up-country Sinhalese of the central mountainous regions, and the low-country Sinhalese of the coastal regions. Although both groups speak the same language, they are distinguished as they observe different cultural customs.

Śūnyatā (/ʃuːnjəˈtɑː/ shoon-yə-TAH; Sanskrit: शून्यता; Pali: suññatā lit. "emptiness", "voidness", "vacuity") is an Indian philosophical concept In Buddhism, Jainism, Hinduism, and other Indian philosophical traditions. The concept has multiple meanings depending on its doctrinal context; an ontological feature of reality, a meditative state, or a phenomenological analysis of experience.

In Theravāda Buddhism, Pali: suññatā often refers to the non-self (Pāli: anattā, Sanskrit: anātman) nature of the five aggregates of experience and the six sense spheres. Pali: Suññatā is also often used to refer to a meditative state or experience.

Buddhist texts are religious texts that belong to, or are associated with, Buddhism and its traditions. There is no single textual collection for all of Buddhism. Instead, there are three main Buddhist Canons: the Pāli Canon of the Theravāda tradition, the Chinese Buddhist Canon used in East Asian Buddhist tradition, and the Tibetan Buddhist Canon used in Indo-Tibetan Buddhism.

The earliest Buddhist texts were not committed to writing until some centuries after the death of Gautama Buddha. The oldest surviving Buddhist manuscripts are the Gandhāran Buddhist texts, found in Pakistan and written in Gāndhārī, they date from the first century BCE to the third century CE. The first Buddhist texts were initially passed on orally by Buddhist monastics, but were later written down and composed as manuscripts in various Indo-Aryan languages (such as Pāli, Gāndhārī, and Buddhist Hybrid Sanskrit). These texts were collected into various collections and translated into other languages such as Buddhist Chinese (fójiào hànyǔ 佛教漢語) and Classical Tibetan as Buddhism spread outside of India.

In the oldest texts of Buddhism, dhyāna (Sanskrit: ध्यान) or jhāna (Pāli) is a component of the training of the mind (bhāvanā), commonly translated as meditation, to withdraw the mind from the automatic responses to sense-impressions and "burn up" the defilements, leading to a "state of perfect equanimity and awareness (upekkhā-sati-parisuddhi)." Dhyāna may have been the core practice of pre-sectarian Buddhism, in combination with several related practices which together lead to perfected mindfulness and detachment.

In the later commentarial tradition, which has survived in present-day Theravāda, dhyāna is equated with "concentration", a state of one-pointed absorption in which there is a diminished awareness of the surroundings. In the contemporary Theravāda-based Vipassana movement, this absorbed state of mind is regarded as unnecessary and even non-beneficial for the first stage of awakening, which has to be reached by mindfulness of the body and vipassanā (insight into impermanence). Since the 1980s, scholars and practitioners have started to question these positions, arguing for a more comprehensive and integrated understanding and approach, based on the oldest descriptions of dhyāna in the suttas.

Maitrī (Sanskrit; Pali: mettā) means benevolence, loving-kindness, friendliness, amity, good will, and active interest in others. It is the first of the four sublime states (Brahmaviharas) and one of the ten pāramīs of the Theravāda school of Buddhism.

The cultivation of benevolence (mettā bhāvanā) is a popular form of Buddhist meditation. It is a part of the four immeasurables in Brahmavihara (divine abidings) meditation. Metta as "compassion meditation" is often practiced in Asia by broadcast chanting, wherein monks chant for the laity.

In Buddhism, an āgama (आगम Sanskrit and Pāli, Tibetan: ལུང་ (Wylie: lung) for "sacred work" or "scripture") is a collection of early Buddhist texts.

The five āgama together comprise the Suttapiṭaka of the early Buddhist schools, which had different recensions of each āgama. In the Pali Canon of the Theravada, the term nikāya is used. The word āgama does not occur in this collection.

Luminous mind (Skt: prabhāsvara-citta or ābhāsvara-citta, Pali: pabhassara citta; Tib: འོད་གསལ་གྱི་སེམས་ ’od gsal gyi sems; Ch: 光明心 guangmingxin; Jpn: 光明心 kōmyōshin) is a Buddhist term that appears only rarely in the Pali Canon, but is common in the Mahayana sūtras and central to the Buddhist tantras. It is variously translated as "brightly shining mind" or "mind of clear light", while the related term luminosity (Skt. prabhāsvaratā; Tib. འོད་གསལ་བ་ ’od gsal ba; Ch. guāng míng; Jpn. kōmyō; Kor. kwangmyōng) is also translated as "clear light" or "luminosity" in Tibetan Buddhist contexts or "purity" in East Asian contexts.

The Theravada school identifies the "luminous mind" with the bhavanga, a concept first proposed in the Theravāda Abhidhamma. The later schools of the Mahayana identify it with bodhicitta and tathagatagarbha. The luminosity of mind is of central importance in the philosophy and practice of the Buddhist tantras, Mahamudra, and Dzogchen.

Kleshas (Sanskrit: क्लेश, romanized: kleśa; Pali: किलेस kilesa; Standard Tibetan: ཉོན་མོངས། nyon mongs), in Buddhism, are mental states that cloud the mind and manifest in unwholesome actions. Kleshas include states of mind such as anxiety, fear, anger, jealousy, desire, etc. Contemporary translators use a variety of English words to translate the term kleshas, such as: afflictions, defilements, destructive emotions, disturbing emotions, negative emotions, mind poisons, and neuroses.

Currently in the Mahayana and Theravada Buddhist traditions, the three kleshas of ignorance, attachment, and aversion are identified as the root or source of all other kleshas. These are referred to as the three poisons in the Mahayana tradition, or as the three unwholesome roots in the Theravada tradition.

Ānāpānasati (Pali; Sanskrit: ānāpānasmṛti), meaning "mindfulness of breathing" (sati means mindfulness; ānāpāna refers to inhalation and exhalation), is the act of paying attention to the breath. It is the quintessential form of Buddhist meditation, attributed to Gautama Buddha, and described in several suttas, most notably the Ānāpānasati Sutta (MN 118).

Derivations of anāpānasati are common to Tibetan, Zen, Tiantai, and Theravada Buddhism as well as Western-based mindfulness programs.