Everyone recognizes a distinction between knowledge and wisdom. . . Wisdom is a kind of knowledge. It is knowledge of the nature, career, and consequences of human values. Since these cannot be separated from the human organism and the social scene, the moral ways of man cannot be understood without knowledge of the ways of things and institutions.

Students rarely disappoint teachers who assure them in advance that they are doomed to failure.

If one shoots at a king, one must not miss.

To silence criticism is to silence freedom.

Life has meaning for anyone who takes an interest in it.

To deny me the right to err is therefore to deny me the right to believe.

Those who say that life is worth living at any cost have already written an epitaph of infamy, for there is no cause and no person that they will not betray to stay alive.