Mankind? That is an abstraction. There have always been and always will be only individuals.

You can put up with everything in this world except not with a long stretch of beautiful days.

Let mental culture go on advancing, let the natural sciences progress in even greater extent and depth, and the human mind widen itself as much as it desires: beyond the elevation and moral culture of Christianity, as it shines forth in the Gospels, it will not go.

The thinker makes a great mistake when he asks after cause and effect. They both together make up the indivisible phenomenon.

Freedom consists not in refusing to recognize anything above us, but in respecting something which is above us; for by respecting it, we raise ourselves to it, and, by our very acknowledgment, prove that we bear within ourselves what is higher, and are worthy to be on a level with it.

And we went our separate ways without having understood each other. As in this world nobody understands the other easily.

A school of art or of anything else is to be looked on as a single individual, who keeps talking to himself for a hundred years, and feels an extreme satisfaction with his own circle of favorite ideas, be they ever so silly.