Once a businessman said to Prabhupada, “I want to serve you, Swami. I want to dedicate my life to you. Everything is for you, Swami.” Prabhupada said, “I am going to Tokyo tomorrow. Come with me and join my preaching tour.” The man said, “But I can’t go.” Prabhupada knew how to call bluffs and how to engage people.
Reference: Memories Anecdotes of a Modern Day Saint – Volume 2 by Siddhanta Dasa