“The man who cannot believe his senses, and the man who cannot believe anything else, are both insane, but their insanity is proved not by any error in their argument, but by the manifest mistake of their whole lives. They have both locked themselves up in two boxes, painted inside with the sun and stars; they are both unable to get out, the one into the health and happiness of heaven, the other even into the health and happiness of the earth.”

“The only other people who have had experiences similar to those of this man were locked up inside institutions for the criminally insane. The difference is, this guy gets business cards.”

“A mystic is a man who separates heaven and earth even if he enjoys them both.”

“Those who talk most about the blessings of marriage and the constancy of its vows are the very people who declare that if the chain were broken and the prisoners left free to choose, the whole social fabric would fly asunder. You cannot have the argument both ways. If the prisoner is happy, why lock him in? If he is not, why pretend that he is?”

“In politics, reality and appearance are of equal importance. You cannot attend to one and neglect the other. A man must determine both what he is, and what others believe him to be.”

“There are two men in each one of us: the scientist, he who starts with a clear field and desires to rise to the knowledge of Nature through observations, experimentation and reasoning, and the man of sentiment, the man of belief, the man who mourns his dead children, and who cannot, alas, prove that he will see them again, but who believes that he will, and lives in the hope – the man who will not die like a vibrio, but who feels that the force that is within him cannot die. ”