Time flies, and what is past is done.

When married one has to get into an argument once in a while since in this way one learns about the other.

How happy he who can still hope to lift himself from this sea of error! What we know not, that we are anxious to possess, and cannot use what we know.

The greatest step forward would be to see that everything factual is already theory. The blueness of the sky reveals the basic lawof chromatics. Don't look for anything behind the phenomena, they themselves are the doctrine.

Whatever you cannot understand, you cannot possess.

Well-mannered children could be conceived if the parents were well-mannered.

Every man has enough power left to carry out that of which he is convinced.