The Gay Science, section 108

Something might be true while being harmful and dangerous in the highest degree. Indeed, it might be a basic characteristic of existence that those who know it completely would perish, in which case the strength of a spirit should be measured according to how much of the 'truth' one could still barely endure- or to put it more clearly, to what degree one would require it to be thinned down, shrouded, sweetened, blunted, falsified.

I am alone again and I want to be so; alone with the pure sky and open sea.

Books for general reading always smell bad; the odor of common people hangs around them.

Women's modesty generally increases with their beauty.

We are franker towards others than towards ourselves.

No honey is sweeter than that of knowledge.