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 most unendurable thing, to be sure, the really terrible thing, would be a life without habits, a life which continually required improvisation.

Examine the life of the best and most productive men and nations, and ask yourselves whether a tree which is to grow proudly skywards can dispense with bad weather and storms. Whether misfortune and opposition, or every kind of hatred, jealousy, stubbornness, distrust, severity, greed, and violence do not belong to the favourable conditions without which a great growth even of virtue is hardly possible?

A little poison now and then: that makes for pleasant dreams. And a lot of poison at the end, for a pleasant death.

One often contradicts an opinion when what is uncongenial is really the tone in which it was conveyed.

The criminal is quite frequently not equal to his deed: he belittles and slanders it.

We are unknown to ourselves, we men of knowledge - and with good reason. We have never sought ourselves - how could it happen that we should ever find ourselves? It has rightly been said: "Where your treasure is, there will your heart be also"; our treasure is where the beehives of our knowledge are.