Say this expression to a Believer when they are being irrational. One thing that is so difficult to do is get those who have been brainwashed by religion to realize the origin of their thoughts. Critical thinking is so important when finding one's way through life.
Generalization's root word is Generalize. The state of being - Generalized paired with Principles, you get Generalized Principles; the facts of order in Nature. It is possible to state facts that are truly Generalised, a contradiction to being False.
The popular Idiom "Theory of Evolution" is just that, words together meaning different from usage separately. Evolution is as much a Theory as Gravity is a Theory. One says Gravity not "Theory of Gravity". In like kind, one should say Evolution not "Theory of Evolution".
Without memory, there would be no Guilt, therefore no Mortality. Without humanity, there would be no God. God is a thing as delicate as existence, no humans, no God. "I think, therefore I am".
Faith-based assumptions are mostly seated in vanity, the belief that we (humankind) are somehow blessed by a divine force; this is poison to the mind. The only thing in the real world that makes us special is the desire to benefit others even this may in itself be selfish.