universal compassion is the only guarantee of morality.

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.)

Of all the intellectual faculties, judgment is the last to mature. A child under the age of fifteen should confine its attention either to subjects like mathematics, in which errors of judgment are impossible, or to subjects in which they are not very dangerous, like languages, natural science, history, etc.

In action a great heart is the chief qualification. In work, a great head.

The first forty years of life give us the text; the next thirty supply the commentary on it.

The animal lacks both anxiety and hope because its consciousness is restricted to what is clearly evident and thus to the present moment: the animal is the present incarnate.

Personal courage is really a very subordinate virtue-a virtue, indeed, in which we are surpassed by the lower animals; or else you would not hear people say, as brave as a lion.