We know accurately only when we know little, with knowledge doubt increases.

Those only obtain love, for the most part, who seek it not.

What is part of you, you cannot get rid of, even if you were to throw it away.

Mathematics has the completely false reputation of yielding infallible conclusions. Its infallibility is nothing but identity. Two times two is not four, but it is just two times two, and that is what we call four for short. But four is nothing new at all. And thus it goes on and on in its conclusions, except that in the higher formulas the identity fades out of sight.

Woe to him who would ascribe something like reason to Chance, and make a religion of surrendering to it.

I am amazed to see how deliberately I have entangled myself step by step. To have seen my position so clearly, and yet to have acted so like a child!

A man is really alive only when he delights in the good-will of others.