To discover the soul living in somebody's body, we watch the surrounding of the body, and if it's messy and disordered, so is the soul.

There are three classes of people: those who see, those who see when they are shown, those who do not see.

Why are the bones of great fishes, and oysters and corals and various other shells and sea-snails, found on the high tops of mountains that border the sea, in the same way in which they are found in the depths of the sea?

Every action done by nature is done in the shortest way.

It is a far worthier thing to read by the light of experience than to adorn oneself with the labors of others.

The art of procreation and the members employed therein are so repulsive, that if it were not for the beauty of the faces and the adornments of the actors and the pent-up impulse, nature would lose the human species.

You will never have a greater or lesser dominion than that over yourself.