Most of the time in married life is taken up by talk.

He who knows himself to be profound endeavors to be clear; he who would like to appear profound to the crowd endeavors to be obscure.

Every one being allowed to learn to read, ruineth in the long run not only writing but also thinking.

He who does not need to lie is proud of not being a liar.

Morality is the best of all devices for leading mankind by the nose.

Mystical explanations are thought to be deep; the truth is that they are not even shallow.

Mathematics would certainly have not come into existence if one had known from the beginning that there was in nature no exactly straight line, no actual circle, no absolute magnitude.