Our duty is to be useful, not according to our desires but according to our powers.

Analysis kills spontaneity.

Let the living live; and you, gather together your thoughts, leave behind you a legacy of feeling and ideas; you will be most useful so.

Life is but a daily oscillation between revolt and submission.

I am a spectator, so to speak, of the molecular whirlwind which men call individual life; I am conscious of an incessant metamorphosis, an irresistible movement of existence, which is going on within me -- and this phenomenology of myself serves as a window opened upon the mystery of the world.