I would construct and work along various lines until I found them untenable. When one theory was discarded, I developed another at once. I realized very early that this was the only possible way for me to work out all the problems.

In 'Common Sense' Paine flared forth with a document so powerful that the Revolution became inevitable. Washington recognized the difference, and in his calm way said that matters never could be the same again.

The entity that gives life and motion to the human body is finer still and lies infinitely beyond the reach of our finest scientific instruments. When this entity deserts the body, the body is like a ship without a rudder - deserted, motionless, dead.

I will not say I failed 1000 times, I will say that I discovered there are 1000 ways that can cause failure

Good fortune is what happens when opportunity meets with planning.

If I could solve all the problems myself, I would.

The chief function of the body is to carry the brain around.