The secret of happiness is to find a congenial monotony.

The secret of happiness is to admire without desiring. And that is not happiness.

The secret of happiness is variety, but the secret of variety, like the secret of all spices, is knowing when to use it.

The secret of masonry is to keep a secret.

The secret of happiness is: Find something more important than you are and dedicate your life to it.

The secret of my success is a two word answer: Know people.