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.

Nature is full of infinite causes that have never occurred in experience.

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.

Those who are inspired by a model other than Nature, labor in vain.

Of several bodies, all equally large and equally distant, that which is most brightly illuminated will appear to the eye nearest and largest.

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

The fox when it sees a flock of herons or magpies or birds of that kind, suddenly flings himself on the ground with his mouth open to look as he were dead; and these birds want to peck at his tongue, and he bites off their heads.