Add a few drops of venom to a half truth and you have an absolute truth.

The individual's most vital need is to prove his worth, and this usually means an insatiable hunger for action. For it is only the few who can acquire a sense of worth by developing and employing their capacities and talents. The majority prove their worth by keeping busy.

A great man's greatest good luck is to die at the right time.

Sometimes we feel the loss of a prejudice as a loss of vigor.

Man is a luxury-loving animal. Take away play, fancies, and luxuries, and you will turn man into a dull, sluggish creature, barely energetic enough to obtain a bare subsistence. A society becomes stagnant when its people are too rational or too serious to be tempted by baubles.

We have rudiments of reverence for the human body, but we consider as nothing the rape of the human mind.

The ignorant are a reservoir of daring. It almost seems that those who have yet to discover the known are particularly equipped for dealing with the unknown. The unlearned have often rushed in where the learned feared to tread, and it is the credulous who are tempted to attempt the impossible. They know not whither they are going, and give chance a chance.