All animals, except man, know that the principal business of life is to enjoy it.

One of the first businesses of a sensible man is to know when he is beaten and to leave off fighting at once.

The one serious conviction that a man should have is that nothing is to be taken too seriously.

Life is not an exact science, it is an art.

In law, nothing is certain but the expense.

A hen is only an egg's way of making another egg.

Life is like playing a violin solo in public and learning the instrument as one goes on.

God cannot alter the past, though historians can.

Brigands demand your money or your life; women require both.

Life is the art of drawing sufficient conclusions from insufficient premises.

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

There is nothing on which men are commonly more intent than on making a way for their opinions.

The only thing certain is nothing is certain.

Only the fools are certain and assured.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

We need to interpret interpretations more than to interpret things.

A man must learn to endure patiently what he cannot avoid conveniently.

Confidence in the goodness of another is good proof of one's goodness.

A man is not hurt so much by what happens, as by his opinion of what happens.