If you are going to build something in the air it is always better to build castles than houses of cards.

He who is enamored of himself will at least have the advantage of being inconvenienced by few rivals.

I have remarked very clearly that I am often of one opinion when I am lying down and of another when I am standing up.

What I do not like about our definitions of genius is that there is in them nothing of the day of judgment, nothing of resounding through eternity and nothing of the footsteps of the Almighty.

One should never trust a person who, while assuring you of something, puts his hands on his heart.

Perhaps pure reason without heart would never have thought of God.

Honest unaffected distrust of human abilities under all circumstances is the surest sign of strength of mind.