Don't learn to do, but learn in doing.

If you follow reason far enough it always leads to conclusions that are contrary to reason.

God was satisfied with his own work, and that is fatal.

There is nothing so unthinkable as thought, unless it be the entire absence of thought.

A physician's physiology has much the same relation to his power of healing as a cleric's divinity has to his power of influencing conduct.

Academic and aristocratic people live in such an uncommon atmosphere that common sense can rarely reach them.

The seven deadly sins: Want of money, bad health, bad temper, chastity, family ties, knowing that you know things, and believing in the Christian religion.