Do ask yourself why you, the individual, exist, and if you can get no other answer try for once to justify the meaning of your existence as it were a posteriori by setting before yourself an aim, a goal, a 'to this end', an exalted and noble 'to this end'.

Rash actions are seldom committed in isolation. With the first rash action we always do too much. So we usually go on to commit asecond one--and then we do too little.

I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage.

Not to him who is offensive to us are we most unfair, but to him who doth not concern us at all.

We are unknown to ourselves, we men of knowledge - and with good reason. We have never sought ourselves - how could it happen that we should ever find ourselves? It has rightly been said: "Where your treasure is, there will your heart be also"; our treasure is where the beehives of our knowledge are.

Strength is the morality of the man who stands out from the rest, and it is mine.

For it is only as an aesthetic phenomenon that existence and the world are eternally justified.