Please send me your last pair of shoes, worn out with dancing as you mentioned in your letter, so that I might have something to press against my heart.

I hate everything that merely instructs me without augmenting or directly invigorating my activity.

One never learns to understand truly anything but what one loves.

Everything in science depends on what one calls an aperçu, on becoming aware of what is at the bottom of the phenomena. Such becoming aware is infinitely fertile.

Love, whose power youth feels, is not suitable for the elderly, just as little as anything that presupposes productivity. It is rare that productivity lasts through the years.

Self-knowledge comes from knowing other men.

The useful may be trusted to further itself, for many produce it and no one can do without it; but the beautiful must be specially encouraged, for few can present it, while yet all have need of it.