Yoga (Sanskrit: योग) is a commonly known generic term for the physical, mental, and spiritual practices or disciplines which originated in ancient India with a view to attain a state of permanent peace. It is practiced in many different ways all over the world. Specifically, yoga is one of the six āstika ("orthodox") schools of Hindu philosophy. One of the most detailed and thorough expositions on the subject is the Yoga Sūtras of Patañjali, which defines yoga as "the stilling of the changing states of the mind" (Sanskrit: योग: चित्त-वृत्ति निरोध:). Yoga has also been popularly defined as "union with the divine" in other contexts and traditions. Various traditions of yoga are found in Buddhism, Hinduism, Jainism and Sikhism.
Drishti (IPA: [ dɽʂʈi ]; Sanskrit: दृष्टि; IAST:dṛṣṭi), or focused gaze, is a means for developing concentrated intention. It relates to the fifth limb of yoga (pratyahara) concerning sense withdrawal, as well as the sixth limb dharana relating to concentration.
Patañjali Tamil: பதஞ்ஜலி (Sanskrit: पतञ्जलि, IPA: [pət̪əɲɟəli]; fl. 150 BCE) is the compiler of the Yoga Sūtras, an important collection of aphorisms on Yoga practice. According to tradition, the same Patañjali was also the author of the Mahābhāṣya, a commentary on Kātyāyana's vārttikas (short comments) on Pāṇini's Aṣṭādhyāyī and of an unspecified work of medicine (āyurveda).