Master, in the context of yoga, is generally used to refer to a person who has achieved a level of self-mastery. A master may be considered as a yogi who is Self-realized. The title may also be used by a yoga student as a respectful way to address their guru or spiritual leader. In fact, guru is a Sanskrit term meaning “master” or “teacher.”
It is said in the Bhagavad Gita that it is possible to acquire transcendental knowledge from a master through humble service, reverence and devotion to them. The master may have the power to enlighten the minds of his/her students, to give them initiatory mantras, and/or to instruct them in rituals and ceremonies for their spiritual development.