Men still have to be governed by deception.

We have to believe that everything has a cause, as the spider spins its web in order to catch flies. But it does this before it knows there are such things as flies.

If there were only turnips and potatoes in the world, someone would complain that plants grow the wrong way.

It often takes more courage to change one's opinion than to stick to it.

The feeling of health can only be gained by sickness.

As soon as you know a man to be blind, you imagine that you can see it from his back.

I forget most of what I read, just as I do most of what I have eaten, but I know that both contribute no less to the conservation of my mind and my body on that account.