I have come to realize that an early symptom of approaching mental illness is the belief that one's work is terribly important. If you consider your work very important you should take a day off.

As for earthquakes, though they were still formidable, they were so interesting that men of science could hardly regret them.

No Carthaginian denied Moloch, because to do so would have required more courage that was required to face death in battle.

We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power.

There are certain things that our age needs. It needs, above all, courageous hope and the impulse to creativeness.

Men fear thought as they fear nothing else on earth - more than ruin, more even than death.

I did not know I loved you until I heard myself telling so, for one instance I thought, "Good God, what have I said?" and then I knew it was true.