Madhusudana : I had been involved in drug-taking, and my parents thought the Hare Krishna movement was another drug-taking cult. When they met Prabhupada he convinced them that wasn’t the case. After that, Prabhupada would often ask me how my parents were, and once he said, “You are the father of your father. The father means one who gives birth to life and you are giving birth to spiritual life. So actually, you are the real father.“
You are the father of your father
Reference: Memories Anecdotes of a Modern Day Saint – Volume 1 by Siddhanta Dasa