At this time, Prabhupada told Swarup Damodar that there are four kinds of birth. There is birth from the egg, birth from sweat, birth from the womb and birth from the seed. He said, "So there's four kinds of birth, but scientists say that life comes from a combination of chemicals. Life comes in four ways, through seeds, through sweat, through the womb and through eggs. Life comes from life. The scientists cannot understand the verse from Bhagavad-gita, brahma-bhuta prasannatma, na socati na kanksati. They cannot understand that the brahma-bhuta person is self-realized and experiences happiness within. Even if his body is completely destroyed, he is in ecstasy." Then he said, "I am that brahma-bhuta person." Those were Prabhupada's last words when he was speaking to us. "I am that brahma-bhuta person."
Reference:Memories Anecdotes of a Modern Day Saint - Volume 3 by Siddhanta Dasa