A man who is very busy seldom changes his opinions.

The Germans are like women, you can scarcely ever fathom their depths - they haven't any.

Better know nothing than half-know many things.

All preachers of morality, as also all theologians have a bad habit in common: all of them try to persuade man that he is very ill, and that a severe, final, radical cure is necessary.

Whoever knows he is deep tries to be clear, but whoever wants to seem deep to the crowd tries to be obscure. For the crowd supposes that anything it cannot see to the bottom must be deep: it is so timid and goes so unwillingly into the water.

Whoever has character also has his typical experience, which returns over and over again.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal.