There are people who are so full of common sense that they haven't the slightest cranny left for their own sense.
The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.
Fascism is cured by reading, and racism is cured by traveling
Faith which does not doubt is dead faith.
The only way to give finality to the world is to give it consciousness.
Chemistry ought to be not for chemists alone.