I have long held the opinion that the amount of noise that anyone can bear undisturbed stands in inverse proportion to his mental capacity and therefore be regarded as a pretty fair measure of it.

There are, first of all, two kinds of authors: those who write for the subject's sake, and those who write for writing's sake.

Poverty and slavery are thus only two forms ofthe same thing, the essence of which is that a man's energies are expended for the most part not on his own behalf but on that of others.

Mensch kann tun was er will; er kann aber nicht wollen was er will. (One can choose what to do, but not what to want.)

Life is a business that does not cover the costs.

If at any moment Time stays his hand, it is only when we are delivered over to the miseries of boredom.

That arithmetic is the basest of all mental activities is proved by the fact that it is the only one that can be accomplished by a machine.