On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.

Antithesis is the narrow gateway through which error most prefers to worm its way towards truth.

Of all writings I love only that which is written with blood. Write with blood: and you will discover that blood is spirit.

The believer in magic and miracles reflects on how to impose a law on nature--: and, in brief, the religious cult is the outcome of this reflection.

What Europe owes to the Jews? - Many things, good and bad, and above all one thing of the nature both of the best and the worst: the grand style in morality, the fearfulness and majesty of infinite demands, of infinite significations, the whole Romanticism and sublimity of moral questionableness - and consequently just the most attractive, ensnaring, and exquisite element in those iridescences and allurements to life, in the aftersheen of which the sky of our European culture, its evening sky, now glows - perhaps glows out.

The patient. The pine tree seems to listen, the fir tree to wait: and both without impatience: - they give no thought to the little people beneath them devoured by their impatience and their curiosity.

A physician who treated me as a nervous case for a while said in the end "No! It is not a matter of your nerves; it is I who am nervous".