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

If the world does improve on the whole, yet youth must always begin anew, and go through the stages of culture from the beginning.

The history of knowledge is a great fugue in which the voices of the nations one after the other emerge.

What you desire when young, you have in abundance when old.

Children, love one another, and if that is not possible-at least try to put up with one another.

We accept every person in the world as that for which he gives himself out, only he must give himself out for something. We can put up with the unpleasant more easily than we can endure the insignificant.

People are always talking about originality, but what do they mean? As soon as we are born, the world begins to work upon us, and this goes on to the end.