In the end we retain from our studies only that which we practically apply.

It is a great pleasure to transport one's-self into the spirit of the times; to see how a wise man has thought before us, and to what a glorious height we have at last carried it.

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.

The history of knowledge is a great fugue in which the voices of the nations one after the other emerge.

Everybody wants to be somebody; nobody wants to grow.

To accept good advice is but to increase one's own ability.

All that is alive tends toward color, individuality, specificity, effectiveness and opacity. All that is done with life inclines toward knowledge, abstraction, generality transfiguration and transparency.