Let us consider that we are all partially insane. It will explain us to each other; it will unriddle many riddles; it will make clear and simple many things which are involved in haunting and harassing difficulties and obscurities now.

Travel is fatal to bigotry.

A successful book is not made of what is in it, but what is left out of it.

I make it a rule never to smoke while I'm sleeping.

Part of the secret of a success in life is to eat what you like and let the food fight it out inside.

I thoroughly disapprove of duels. If a man should challenge me, I would take him kindly and forgivingly by the hand and lead him to a quiet place and kill him.

We all live in the protection of certain cowardices which we call our principles.