Yogi

Literally meaning “one possessing
yoga,” in practice the word refers only to
a yogic adept—someone who “possesses”
yoga in the sense of having mastered
it—rather than to anyone simply practicing yoga. True yogis are widely
believed to have superhuman powers
(siddhi) as a by-product of their long
spiritual development, which they can
and will exercise for the benefit of their
disciples—for physical healing of diseases, for psychological help, or for giving guidance on both spiritual and
mundane matters. The yogi is seen as a
spiritually realized person, and their
authority stems completely from this
attribution, which paradoxically is not
subject to any sort of external verification.
782
Yoga Mudra
Consequently, there are significant differences of opinion on whether or not
any particular person is a yogi.