When the ordinary thought of a highly cultivated people begins to regard 'having children' as a question of pro's and con's, the great turning point has come.

Optimism is cowardice.

Philosophy, the love of Wisdom, is at the very bottom defence against the incomprehensible.

One cannot learn how to be creative by reading Marx. Either one is creative or one is not.

The last man of the world-city no longer wants to live--he may cling to life as an individual, but as a type, as an aggregate, no, for it is a characteristic of this collective existence that it eliminates the terror of death.

One day the last portrait of Rembrandt and the last bar of Mozart will have ceased to be — though possibly a colored canvas and a sheet of notes will remain — because the last eye and the last ear accessible to their message will have gone.

It doesn't really matter what one writes into a constitution. The important thing is what the collective instinct eventually makes of it.