Alas, I have studied philosophy, the law as well as medicine, and to my sorrow, theology; studied them well with ardent zeal, yet here I am, a wretched fool, no wiser than I was before.

Love is an ideal thing, marriage a real thing; a confusion of the real with the ideal never goes unpunished.

Behavior is the mirror in which everyone shows their image.

Nature is the living, visible garment of God.

I hate every violent overthrow, because as much is destroyed as is gained by it.

The greatest act of faith takes place when a man finally decides that he is not God.

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.