Perhaps I know best why it is man alone who laughs; he alone suffers so deeply that he had to invent laughter.

And if you are not a bird, then beware of coming to rest above an abyss.

Every one being allowed to learn to read, ruineth in the long run not only writing but also thinking.

A labyrinthine man never seeks the truth, but only his Ariadne.

To be ashamed of one's immorality: that is a step on the staircase at whose end one is also ashamed of one's morality.

There is sense in hoping for recognition in a distant future only when we take it for granted that mankind will remain essentially unchanged, and that whatever is great is not for one age only but will be looked upon as great for all time.

When we are tired, we are attacked by ideas we conquered long ago.