From barbarism to civilization requires a century; from civilization to barbarism needs but a day.

What if it is for life's sake that we must die? In truth we are not individuals; and it is because we think ourselves such that death seems unforgivable. We are temporary organs of the race, cells in the body of life; we die and drop away that life may remain young and strong. If we were to live forever, growth would be stifled, and youth would find no room on earth. Death, like style, is the removal of rubbish, the circumcision of the superfluous. In the midst of death life renews itself immortally.

The experience of the past lives little doubt that every economic system must sooner or later rely upon some form of the profit motive to stir individuals and groups to productivity. Substitutes like slavery, police supervision, or ideological enthusiasm prove too unproductive, too expensive, or too transient.

Woe to him who teaches men faster than they can learn.

Science tells us how to heal and how to kill; it reduces our death rate in retail and then kills us wholesale in war; but only wisdom - desire coordinated in the light of all experience - can tell us when to heal and when to kill.

Rome remained great as long as she had enemies who forced her to unity, vision, and heroism. When she had overcome them all she flourished for a moment and then began to die.

History is mostly guessing; the rest is prejudice.