The worst thing you can possibly do is worrying and thinking about what you could have done.

What a blessing it would be if we could open and shut our ears...as easily as we open and shut our eyes.

I have never yet met anyone who did not think it was an agreeable sensation to cut tinfoil with scissors.

God creates the animals, man creates himself.

Men still have to be governed by deception.

One is rarely an impulsive innovator after the age of sixty, but one can still be a very fine orderly and inventive thinker. One rarely procreates children at that age, but one is all the more skilled at educating those who have already been procreated, and education is procreation of another kind.

With a pen in my hand I have successfully stormed bulwarks from which others armed with sword and excommunication have been repulsed.