“In order to disprove the assertion that all crows are black, one white crow is sufficient.”

“If you wish to upset the law that all crows are black, you mustn't seek to show that no crows are; it is enough if you prove one single crow to be white.”

“The crow wished everything was black, the Owl, that everything was white.”

“When once a decision is reached and execution is the order of the day, dismiss absolutely all responsibility and care about the outcome.”

“And although I have seen nothing but black crows in my life, it doesn't mean that there's no such thing as a white crow. Both for a philosopher and for a scientist it can be important not to reject the possibility of finding a white crow. You might almost say that hunting for 'the white crow' is science's principal task.”

“I will make thee think thy swan a crow.”

“Were one asked to characterize the life of religion in the broadest and most general terms possible, one might say that it consists of the belief that there is an unseen order, and our supreme good lies in harmoniously adjusting ourselves thereto.”