Everything comes from everything, and everything is made out of everything, and everything returns into everything.

The eye is the window of the human body through which it feels its way and enjoys the beauty of the world.

There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.

Common Sense is that which judges the things given to it by other senses.

As regards this vice, we read that the peacock is more guilty of it than any other animal. For it is always contemplating the beauty of its tail, which it spreads in the form of a wheel, and by its cries attracts to itself the gaze of the creatures that surround it. And this is the last vice to be conquered.

Learning is the only thing the mind never exhausts, never fears, and never regrets.

Not to appreciate life, all of life, is not to deserve it.