A change of values - that means, a change of the creators of values. He who has to be a creator always has to destroy.

I love the valiant; but it is not enough to wield a broadsword, one must also know against whom.

"Belief in the truth commences with the doubting of all those "truths" we once believed."

The love of power is the demon of mankind.

Moral sensibilities are nowadays at such cross-purposes that to one man a morality is proved by its utility, while to another its utility refutes it.

What a dissimilarity we see in walking, swimming, and flying. And yet it is one and the same motion: it is just that the load- bearing capacity of the earth differs from that of the water, and that that of the water differs from that of the air! Thus we should also learn to fly as thinkers--and not imagine that we are thereby becoming idle dreamers!

A joke is an epigram on the death of a feeling.