Ātman (Hinduism) in the context of "Mandukya Upanishad"

In Hinduism, the conception of God varies in its diverse religio-philosophical traditions. Hinduism comprises a wide range of beliefs about God and divinity, such as henotheism, monotheism, polytheism, panentheism, pantheism, pandeism, monism, agnosticism, atheism, and nontheism.

Forms of theism find mention in the Bhagavad Gita. Emotional or loving devotion (bhakti) to a primary god such as avatars of Vishnu (Krishna for example), Shiva, and Devi (as emerged in the early medieval period) is now known as the Bhakti movement. Contemporary Hinduism can be categorized into four major theistic Hindu traditions: Vaishnavism, Shaivism, Shaktism, and Smartism. Vaishnavism, Shaivism, and Shaktism worship the Hindu deities Vishnu, Shiva, and Devi as the Supreme God respectively, or consider all Hindu deities as aspects of the same, Supreme Reality or the eternal and formless metaphysical Absolute, called Brahman in Hinduism, or, translated from Sanskrit terminology, Svayaṁ-Bhāgavan ("God Itself"). Other minor sects such as Ganapatya and Saura focus on the deities Ganesha or Surya as the Supreme.

The Upanishads (/ʊˈpʌnɪʃʌdz/; Sanskrit: उपनिषद्, IAST: Upaniṣad, pronounced [ˈupɐniʂɐd]) are Sanskrit texts of the late Vedic and post-Vedic periods that "document the transition from the archaic ritualism of the Veda into new religious ideas and institutions" and the emergence of the central religious concepts of Hinduism. They are the most recent addition to the Vedas, the oldest scriptures of Hinduism, and deal with meditation, philosophy, consciousness, and ontological knowledge. Earlier parts of the Vedas dealt with mantras, benedictions, rituals, ceremonies, and sacrifices.

While among the most important literature in the history of Indian religions and culture, the Upanishads document a wide variety of "rites, incantations, and esoteric knowledge" departing from Vedic ritualism and interpreted in various ways in the later commentarial traditions. The Upanishads are widely known, and their diverse ideas, interpreted in various ways, informed later traditions of Hinduism. The central concern of all Upanishads is to discover the relations between ritual, cosmic realities (including gods), and the human body/person, postulating Ātman and Brahman as the "summit of the hierarchically arranged and interconnected universe", but various ideas about the relation between Atman and Brahman can be found.

Pratītyasamutpāda (Sanskrit: प्रतीत्यसमुत्पाद, Pāli: paṭiccasamuppāda), commonly translated as dependent origination, or dependent arising, is a key doctrine in Buddhism shared by all schools of Buddhism. It states that all dharmas (phenomena) arise in dependence upon other dharmas: "if this exists, that exists; if this ceases to exist, that also ceases to exist". The basic principle is that all things (dharmas, phenomena, principles) arise in dependence upon other things.

The doctrine includes depictions of the arising of suffering (anuloma-paṭiccasamuppāda, "with the grain", forward conditionality) and depictions of how the chain can be reversed (paṭiloma-paṭiccasamuppāda, "against the grain", reverse conditionality). These processes are expressed in various lists of dependently originated phenomena, the most well-known of which is the twelve links or nidānas (Pāli: dvādasanidānāni, Sanskrit: dvādaśanidānāni). The traditional interpretation of these lists is that they describe the process of a sentient being's rebirth in saṃsāra, and the resultant duḥkha (suffering, pain, unsatisfactoriness), and they provide an analysis of rebirth and suffering that avoids positing an atman (unchanging self or eternal soul). The reversal of the causal chain is explained as leading to the cessation of rebirth (and thus, the cessation of suffering).

In the Vedic and Hindu religions, Brahman (Sanskrit: ब्रह्मन्; IAST: Brahman) has a "variety of meanings," but in the Upanishads and later Indian philosophies it connotes 'That' from which all existence proceeds, and to which everything returns, the origin and cause of all that exists. In contemporary Hindu metaphysics it is the highest universal principle, the Ultimate reality of the universe.

Brahman is a concept found in the Vedas, and it is extensively discussed in the early Upanishads, with a variety of meanings. According to Gavin Flood, the concept of Brahman evolved and expanded from the power of sound, words, and rituals in Vedic times to the "deeper foundation of all phenomena," the "essence of the self (Atman, Self)," and the deeper "truth of a person beyond apparent difference." Other scholars such as Barbara Holdrege, Hananya Goodman, and Jan Gonda, contend that the earliest Vedic verses suggest that this ancient meaning was never the only meaning, and the concept evolved and expanded in ancient India.

Mahatma (English pronunciation: /məˈhɑːtmə, məˈhætmə/, Sanskrit: महात्मा, romanized: mahātmā, from Sanskrit महा (mahā) 'great' and आत्मा (ātmā) 'soul') is an honorific used in India. The term is commonly used for Mohandas Karamchand Gandhi, who is often referred to simply as "Mahatma Gandhi" (lit. 'Venerable Gandhi'). Albeit less frequently, this epithet has also been used with regard to such people as Basava (1131–1167), Swami Shraddhanand (1856–1926), Lalon Shah (1772–1890), Ayyankali (1863–1941), and Jyotirao Phule (1827–1890).

The term mahātmā has also been historically used for a class of religious scholars in Jainism; for the selected religious leaders in Theosophy; and for local religious teachers in the Divine Light Mission church.

Nirvana, in the Indian religions (Jainism, Hinduism, Buddhism, and Sikhism), is the concept of an individual's passions being extinguished as the ultimate state of salvation, release, or liberation from suffering (duḥkha) and from the cycle of birth and rebirth (saṃsāra).

In Indian religions, nirvana is sometimes used as a synonym of moksha and mukti. All Indian religions assert it to be a state of perfect quietude, freedom, and highest happiness; liberation from attachment and worldly suffering; and the ending of samsara, the cycle of existence. However, non-Buddhist and Buddhist traditions describe these terms for liberation differently. In Hindu philosophy, it is the union of or the realization of the identity of Atman with Brahman, depending on the Hindu tradition. In Jainism, nirvana is also the soteriological goal, representing the release of a soul from karmic bondage and samsara. The Buddhist concept of nirvana is the abandonment of the 10 fetters, marking the end of rebirth by stilling the "fires" that keep the process of rebirth going.

Upasana (Sanskrit: उपासना upāsanā) literally means "worship" and "sitting near, attend to". It refers to the worship of, or meditation on, formless things, such as Absolute Self, the Holy, the Atman (Soul) Principle, distinguishing meditative reverence for an internalized and intellectual concept from earlier forms of physical worship, actual sacrifices and offerings to Vedic deities.

The term also refers to one of three khaṇḍa (खण्ड, parts) of Vedas, one that focuses on worship or meditation. The other two parts of Vedas are called Aranyakas and Upanishads, sometimes identified as karma-khaṇḍa (कर्म खण्ड, ritualistic sacrifice section) and jñāna-khaṇḍa (ज्ञान खण्ड, knowledge, spirituality section).

Ahamkara (Sanskrit: अहंकार; Romanized: Ahaṁkāra), "I-making," is a Sanskrit term in Hindu philosophy referring to the construction of a self-concept, or the false identification of the self (Purusha, atman) with impermanent entities such as the body, mind, or material objects. It evolves from Mahat-tattva, and is one of the four Antaḥkaraṇa (functions of the mind).