Amogha : On a morning walk I said to Prabhupada, “Non-devotees think Krishna consciousness is a belief, and they question why we call it a science.” Prabhupada said, “If non-devotees can call their beliefs science, then we can call our beliefs science. What they are calling science is really just belief. For example, they believe that the living entity comes from matter, from chemicals. But where is the evidence? Where is the example of a living entity coming from matter, from chemicals? It’s simply a belief, and they’re calling it science. So if they call their belief science, then we can call our belief a science.“
Reference: Memories Anecdotes of a Modern Day Saint – Volume 2 by Siddhanta Dasa