War is one of the constants of history, and it has not diminished with civilization or democracy.

Progress is the domination of chaos by mind and purpose, of matter by form and will. It need not be continuous to be real.

In its youth a people produce mythology and poetry; in its decadence, philosophy and logic.

Civilization begins with order, grows with liberty, and dies with chaos.

In philosophy, as in politics, the longest distance between two points is a straight line.

The individual succumbs, but he does not die if he has left something to mankind.

Education is a progressive discovery of our own ignorance.