Religion will not regain its old power until it can face change in the same spirit as does science. Its principles may be eternal, but the expression of those principles requires continual development.
There are no whole truths; all truths are half- truths. It is trying to treat them as whole truths that plays the devil.
What is morality in any given time or place? It is what the majority then and there happen to like, and immorality is what they dislike.
Everything of importance has been said before by somebody who did not discover it.
Error is the price we pay for progress.
It requires a very unusual mind to undertake the analysis of the obvious.
If a dog jumps in your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.
