I have a theory that the secret of marital happiness is simple: drink in different pubs to your other half.

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

The secret of happiness is to find a congenial monotony.

The secret of your future is hidden in your daily routine.

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.