Insomnia never comes to a man who has to get up exactly at six o'clock. Insomnia troubles only those who can sleep any time.

All wages are based primarily on productive power. Anything else would be charity.

The secret of success is this: there is no secret of success.

Genius is only the power of making continuous efforts.

The only way to retain love is to give it away.

Perfume: any smell that is used to drown a worse one.

Talent does things tolerably well; genius does then intolerably better