Simply studying Bhagavad Gita is not sufficient in itself to know Krishna, but if we simply hear the message of Bhagavad Gita, even if we only hear one sentence, that can be sufficient to give one perfection of life, because as soon as one actually hears the message of Bhagavad Gita, then his life of devotion to Krishna can begin. That is all that is required to go back to Godhead.
November 23, 1991, St.Petersburg