Bhagavad Gita in the context of "Yoga (philosophy)"

Hinduism (/ˈhɪnduˌɪzəm/) is an umbrella term for a range of Indian religious and spiritual traditions (sampradayas) that are unified by adherence to the concept of dharma, a cosmic order maintained by its followers through rituals and righteous living, as expounded in the Vedas. The word Hindu is an exonym, and while Hinduism has been called the oldest surviving religion in the world, it is also described by the 19th century term Sanātana Dharma (lit. 'eternal dharma'). Vaidika Dharma (lit. 'Vedic dharma') and Arya Dharma are historical endonyms for Hinduism.

Hinduism entails diverse systems of thought, marked by a range of shared concepts that discuss theology, mythology, and other topics in textual sources. Hindu texts have been classified into Śruti (lit. 'heard') and Smṛti (lit. 'remembered'). The major Hindu scriptures are the Vedas, the Upanishads, the Puranas, the Mahabharata (including the Bhagavad Gita), the Ramayana, and the Agamas. Prominent themes in Hindu beliefs include karma (action, intent and consequences), saṃsāra (the cycle of death and rebirth) and the four Puruṣārthas, proper goals or aims of human life, namely: dharma (ethics/duties), artha (prosperity/work), kama (desires/passions) and moksha (liberation/emancipation from passions and ultimately saṃsāra). Hindu religious practices include devotion (bhakti), worship (puja), sacrificial rites (yajna), and meditation (dhyana) and Yoga. Hinduism has no central doctrinal authority and many Hindus do not claim to belong to any denomination. However, scholarly studies notify four major denominations: Shaivism, Vaishnavism, Shaktism and Smartism. The six Āstika schools of Hindu philosophy that recognise the authority of the Vedas are: Sankhya, Yoga, Nyaya, Vaisheshika, Mīmāṃsā, and Vedanta.

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 Mahābhārata (/məˌhɑːˈbɑːrətə, ˌmɑːhə-/ mə-HAH-BAR-ə-tə, MAH-hə-; Sanskrit: महाभारतम्, IAST: Mahābhāratam, pronounced [mɐɦaːˈbʱaːrɐt̪ɐm]) is a smriti text (also described as a Sanskrit epic) from ancient India, one of the two important epics of Hinduism known as the Itihasas, the other being the Ramayana. It narrates the events and aftermath of the Kurukshetra War, a war of succession between two groups of princely cousins, the Kauravas and the Pāṇḍavas. It contains philosophical and devotional material, such as a discussion of the four "goals of life" or puruṣārtha (12.161). Among the principal works and stories in the Mahābhārata are the Bhagavad Gita, the story of Damayanti, the story of Shakuntala, the story of Pururava and Urvashi, the story of Savitri and Satyavan, the story of Kacha and Devayani, the story of Rishyasringa and an abbreviated version of the Rāmāyaṇa, often considered as works in their own right.

Traditionally, the authorship of the Mahābhārata is attributed to Vyāsa. There have been many attempts to unravel its historical growth and compositional layers. The bulk of the Mahābhārata was probably compiled between the 3rd century BCE and the 3rd century CE, with the oldest preserved parts not much older than around 400 BCE. The text probably reached its final form by the early Gupta period (c. 4th century CE).

Bhakti (Sanskrit: भक्ति; Pali: bhatti) is a concept common in Indian religions which means attachment, fondness for, devotion to, trust, homage, worship, piety, faith, or love. In Indian religions, it may refer to loving devotion for a personal God (like Krishna or Devi), a formless ultimate reality (like Nirguna Brahman or the Sikh God) or an enlightened being (like a Buddha, a bodhisattva, or a guru). Bhakti is often a deeply emotional devotion based on a relationship between a devotee and the object of devotion. A devotee is a bhakta or bhakt.

One of the earliest appearances of the concept is found in the early Buddhist Theragatha (Verses of the Elders) through the term bhatti. Early texts such as the Shvetashvatara Upanishad and the Bhagavad Gita, describe bhakti as contemplating God as a form of yoga.

Vedanta (/veɪˈdɑːntə/; Sanskrit: वेदान्त, IAST: Vedānta [ʋeːdɑ́ːntɐ]), also known as Uttara Mīmāṃsā, is one of the six orthodox (āstika) traditions of Hindu philosophy and textual exegesis. The word Vedanta means 'conclusion of the Vedas,' and encompasses the ideas that emerged from, or aligned and reinterpreted, the speculations and enumerations contained in the Upanishads, focusing, with varying emphasis, on devotion, knowledge, and liberation. Vedanta developed into many traditions, all of which give their specific interpretations of a common group of texts called the Prasthānatrayī, translated as 'the three sources': the Upanishads, the Brahma Sutras, and the Bhagavad Gita.

All Vedanta traditions place great emphasis on textual exegesis and contain extensive discussions on ontology, soteriology, and epistemology, even as there is much disagreement among the various traditions. Independently considered, they may seem completely disparate due to the pronounced differences in thoughts and reasoning.

Krishna (/ˈkrɪʃnə/; Sanskrit: कृष्ण, IAST: Kṛṣṇa Sanskrit: [ˈkr̩ʂɳɐ] ) is a major deity in Hinduism. He is worshipped as the eighth avatar of Vishnu and also as the Supreme God in his own right. He is the god of protection, compassion, tenderness, and love; and is widely revered among Hindu divinities. Krishna's birthday is celebrated every year by Hindus on Krishna Janmashtami according to the lunisolar Hindu calendar, which falls in late August or early September of the Gregorian calendar.

The anecdotes and narratives of Krishna's life are generally titled as Krishna Līlā. He is a central figure in the Mahabharata, the Bhagavata Purana, the Brahma Vaivarta Purana, and the Bhagavad Gita, and is mentioned in many Hindu philosophical, theological, and mythological texts. They portray him in various perspectives: as a god-child, a prankster, a model lover, a divine hero, and the universal supreme being. His iconography reflects these legends and shows him in different stages of his life, such as an infant eating butter, a young boy playing a flute, a handsome youth with Radha or surrounded by female devotees, or a friendly charioteer giving counsel to Arjuna.

Avatar (Sanskrit: अवतार, IAST: Avatāra; pronounced [ɐʋɐt̪aːɾɐ]) is a concept within Hinduism that in Sanskrit literally means 'descent'. It signifies the material appearance or incarnation of a powerful deity, or spirit on Earth, including in human form. The relative verb to "alight, to make one's appearance" is sometimes used to refer to any guru or revered human being.

The word avatar does not appear in the Vedic literature; however, it appears in developed forms in post-Vedic literature, and as a noun particularly in the Puranic literature after the 6th century CE. Despite that, the concept of an avatar is compatible with the content of the Vedic literature like the Upanishads as it is symbolic imagery of the Saguna Brahman concept in the philosophy of Hinduism. The Rigveda describes Indra as endowed with a mysterious power of assuming any form at will. The Bhagavad Gita expounds the doctrine of Avatara but with terms other than avatar.