Virtues are dangerous as vices insofar as they are allowed to rule over one as authorities and not as qualities one develops oneself.

Existence really is an imperfect tense that never becomes a present.

What is bad? All that proceeds from weakness

A living being seeks, above all, to discharge its strength. Life is will to power.

Necessity is not an established fact, but an interpretation.

To get into just those situations where sham virtues will not suffice, but rather where, as with the ropedancer on his rope, one either falls or stands--or gets down.

Logic, too, also rests on assumptions that do not correspond to anything in the real world, e.g., on the assumption that there areequal things, that the same thing is identical at different points in time: but this science arose as a result of the opposite belief (that such things actually exist in the real world). And it is the same with mathematics, which would certainly never have arisen if it had been understood from the beginning that there is no such thing in nature as a perfectly straight line, a true circle, and absolute measure.