Candramauli Swami : In New Vrindavan a devotee asked, “Prabhupada, what happens if we have no determination?” Prabhupada said, “Then you are an animal. An animal cannot be determined. As soon as they hear a little sound, they run in fear. So no determination means animal life. You must have determination otherwise you can’t execute Krishna consciousness.” He made a strong and clear statement: “You are an animal if you can’t become determined.“
Reference: Memories Anecdotes of a Modern Day Saint – Volume 3 by Siddhanta Dasa