The spirit is never at rest, but always engaged in progressive motion, giving itself new form.

When individuals and nations have once got in their heads the abstract concept of full-blown liberty, there is nothing like it in its uncontrollable strength.

Reading the morning newspaper is the realist's morning . One orients one's attitude toward the either by or by what the world is. The former gives as much security as the latter, in that one knows how one stands.

Genuine tragedies in the world are not conflicts between right and wrong. They are conflicts between two rights.

The more certain our knowledge the less we know.

Science and knowledge, especially that of philosophy, came from the Arabs into the West.

To him who looks at the world rationally the world looks rationally back.