Learn to limit yourself; to content yourself with some definite work; dare to be what you are and learn to resign with a good grace all that you are not; and to believe in your own individuality.

Clever people will recognize and tolerate nothing but cleverness.

You desire to know the art of living, my friend? It is contained in one phrase: make use of suffering.

The philosopher aspires to explain away all mysteries, to dissolve them into light. Mystery, on the other hand, is demanded and pursued by the religious instinct; mystery constitutes the essence of worship.

The obscure only exists that it may cease to exist. In it lies the opportunity of all victory and all progress. Whether it call itself fatality, death, night, or matter, it is the pedestal of life, of light, of liberty and the spirit. For it represents resistance -- that is to say, the fulcrum of all activity, the occasion for its development and its triumph.

Happiness gives us the energy which is the basis of health.

It is by teaching that we teach ourselves, by relating that we observe, by affirming that we examine, by showing that we look, by writing that we think, by pumping that we draw water into the well.