A person, if he is exemplary, when he speaks, Krishna gives his words potency. That is required when one actually wants to be an effective preacher of Krishna consciousness. Unless his words and instructions are actually given potency by the Lord, then he cannot actually change the hearts of others. Because a devotee, he doesn’t think that he is changing hearts. A devotee is one who knows that only Krishna can change the hearts of others because Krishna is in everyone’s heart.
June 11, 1996, Krasnodar