“Physics advances by accepting absurdities. Its history is one of unbelievable ideas proving to be true.”

“Just because an idea is true doesn't mean it can be proved. And just because an idea can be proved doesn't mean it's true.”

“It's not the cost (although that pinches), or the time (though that grinds). After a while, it's the sheer galling indignity of being asked to prove, pay, and prove all over again that you're a worthy parent. Any true parent will tell you that that is impossible to prove in advance.”

“If we all worked on the assumption that what is accepted as true is really true, there would be little hope of advance.”

“Perhaps a physicist would know at once why this whole idea was absurd. But then, perhaps a physicist would be so locked into the consensus of his scientific community that it would be harder for him to accept an idea that transformed the meaning of everything he knew. Even if it were true.”

“Faith ― acceptance of which we imagine to be true, that which we cannot prove.”