When one has finished building one's house, one suddenly realizes that in the process one has learned something that one really needed to know in the worst way - before one began.

To have to fight the instincts - that is the definition of decadence: as long as life is ascending, happiness equals instinct.

I love him who justifieth the future ones, and redeemeth the past ones: for he is willing to succumb through the present ones.

If thinking is your fate, revere this fate with divine honour and sacrifice to it the best, the most beloved

Where I found the living, there I found the will to power; even in the will of servants I found the will to be master.

It is only because man believes himself to be free, not because he is free, that he experiences remorse and pricks of conscience.

Mathematics is merely the means to a general and ultimate knowledge of man.