Jñāna yoga or "union due to pure knowledge" is one of the types of yoga mentioned in Hindu philosophies. Jñāna in Sanskrit means "knowledge".
Jñāna yoga is knowing beyond name and form through pure understanding of the nature of doer, who when seen in clarity results in liberation. This path is different from other forms of Yoga in a sense that other form emphasizes on a structured way of experiencing reality through a process of crystallization carried by doing different forms of meditation. However this path simply states that only knowing is enough. It many a times draw parallels to Samkhya as well. As used in the Bhagavad Gita, the Advaita philosopher Adi Shankara gave primary importance to jñāna yoga as "knowledge of the absolute" (Brahman), while the Vishishtadvaita commentator Ramanuja regarded knowledge only as a condition of devotion. In the Bhagavad Gita (13.3) Krishna says that jñāna consists of properly understanding kshetra (the field of activity—that is, the body) and kshetrajna (the knower of the body—that is, the soul). Later in the Gita (13.35) Krishna emphasizes that a transcendentalist must understand the difference between these two.