Of all the inhabitants of the inferno, none but Lucifer knows that hell is hell, and the secret function of purgatory is to make of heaven an effective reality.

You are not in charge of the universe; you are in charge of yourself.

Always behave as if nothing had happened, no matter what has happened.

We need a sense of the value of time - that is, of the best way to divide one's time into one's various activities.

A sense of the value of time... is an essential preliminary to efficient work; it is the only method of avoiding hurry.

Concentrate on something useful. Having decided to achieve a task, achieve it at all costs.

It is within the experience of everyone that when pleasure and pain reach a certain intensity they are indistinguishable.