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One of three classical paths for moksha in Hinduism

Jnana yoga , also known as the jnana marga (jñāna mārga), is one of the three classical paths (margas) for moksha (liberation) in Hinduism, which emphasizes the "path of knowledge", also known as the "path of self realization". The other two are karma yoga (path of action, karma mārga) and bhakti yoga (path of loving devotion to a personal god, bhakti mārga). Modern interpretations of Hindu texts have yielded systems, techniques and formulations such as raja yoga and kriya yoga. The jñāna yoga is a spiritual practice that pursues knowledge with questions such as "who am I, what am I" among others. The jñāna mārga ideas are discussed in ancient and medieval era Hindu scriptures and texts such as the Upanishads and the Bhagavad Gita.

Jñāna, sometimes transcribed as gyaan, means "knowledge" in Sanskrit. The root jñā is cognate to English know, as well as to the Greek γνώ (as in γνῶσις gnosis). Its antonym is ajñāna "ignorance".

Jnana is knowledge, which refers to any cognitive event that is correct and true over time. It particularly refers to knowledge inseparable from the total experience of its object, especially about reality (non theistic schools) or supreme being (theistic schools). In Hinduism, it is knowledge which gives Moksha, or spiritual liberation while alive (jivanmukti) or after death (videhamukti). According to Bimal Matilal, jnana yoga in Advaita Vedanta connotes both primary and secondary sense of its meaning, that is "self consciousness, awareness" in the absolute sense and relative "intellectual understanding" respectively. According to Jones and Ryan, jnana in jnana yoga context is better understood as "realization or gnosis", referring to a "path of study" wherein one knows the unity between self and ultimate reality called Brahman in Hinduism. This explanation is found in the ancient Upanishads and the Bhagavad Gita. Jñāna yoga is the path towards attaining jnana. It is one of the three classical types of yoga mentioned in Hindu philosophies, the other two being karma yoga and bhakti. In modern classifications, classical yoga, being called Raja yoga, is mentioned as a fourth one, an extension introduced by Swami Vivekananda. Of the three different paths to liberation, jnana marga and karma marga are the more ancient, traceable to Vedic era literature. All three paths are available to any seeker, chosen based on inclination, aptitude and personal preference, and typically elements of all three to varying degrees are practiced by many Hindus. Classical yoga emphasizes the practice of dhyana (meditation), and this is a part of all three classical paths in Hinduism, including jñāna yoga. The path of knowledge is intended for those who prefer philosophical reflection, and it requires study and meditation. Jnana yoga encourages its adepts to think and speak of themselves in the third person as a way to distance themselves from the Ego and detach their eternal self (atman) from the body related one (maya).

In the Upanishads, 'jnana yoga aims at the realization of the oneness of the individual self (Atman) and the ultimate Self (Brahman). These teachings are found in the early Upanishads. The teachings in the Upanishads have been interpreted in a number of ways, ranging from non theistic monism to theistic dualism. According to Robert Roeser, the precepts of Jnana yoga in Hinduism were likely systematized by about 500 BCE, earlier than Karma yoga and Bhakti yoga.

In the Bhagavad Gita, jnana yoga is also referred to as buddhi yoga and its goal is self realization. The text considers jnana marga as the most difficult, slow, confusing for those who prefer it because it deals with "formless reality", the avyakta. It is the path that intellectually oriented people tend to prefer. The chapter 4 of the Bhagavad Gita is dedicated to the general exposition of jnana yoga, while chapters 7 and 16 discuss its theological and axiological aspects. Krishna says that jñāna is the purest, and a discovery of one's Atman:

The Advaita philosopher Adi Shankara gave primary importance to jñāna yoga for the "knowledge of the absolute" (Brahman), while the Vishishtadvaita commentator Ramanujar regarded knowledge only as a condition of devotion.

Both the theistic and monistic streams of Shaivism include jnana yoga ideas, along with those related to karma yoga, and in the case of Saiva Siddhanta ideas related to bhakti yoga. The Shaivism traditions do not consider renunciation necessary for practicing jnana yoga, leaving ascetic yogi lifestyle optional. The methodology of sravana, manana and nididhyasana similar to Advaita Vedanta are also found in various traditions of Shaivism. However, nistha or samadhi is sometimes added in Shaiva methodology. The meditational aspects of Shaivism focus on the nirguna form of Supreme Reality (Shiva). However, Vaishnavism also incorporates Bhakti yoga concepts of loving devotion to the divine Supreme personally selected by the devotee, in saguna form, both in silent meditational and musical expressive styles.

The Shaktism literature on goddess such as Kularnava Tantra highlight jnana marga as important to liberation. It differentiates between two kinds of jnana: one it calls knowledge that comes from Agama texts, and another it calls viveka (insight). The Shaktism literature then adds that both lead to the knowledge of Brahman, but the first one is in the form of sound (shabdabrahman), while the insight from within is the ultimate truth (parabrahman). Some Shakta texts, such as the Sita Upanishad, combine yoga of action and knowledge as a path to liberation. The Devi Gita, a classic text of Shaktism, dedicates chapter 4 to Jnana yoga, stating that a Jnana yogi understands and realizes that there is no difference between the individual soul and herself as the supreme Self. The discussion of Jnana yoga continues through the later chapters of the Devi Gita.