He who knows himself to be profound endeavors to be clear; he who would like to appear profound to the crowd endeavors to be obscure.

He who is usually self-sufficient becomes exceptionally vain and keenly alive to fame and praise when he is physically ill. The more he loses himself the more he has to endeavor to regain his position by means of the opinion of others.

The value of life itself cannot be estimated.

To find everything profound - that is an inconvenient trait. It makes one strain one's eyes all the time, and in the end one finds more than one might have wished.

That which does not kill us makes us stronger.

The so called unconscious inferences can be traced back to the all-preserving memory, which presents us with parallel experiences and hence already knows the consequences of an action. It is not anticipation of the effects; rather, it is the feeling: identical causes, identical effects . . .

In everything one thing is impossible: rationality.