Many have made a trade of delusions and false miracles, deceiving the stupid multitudes.

Strive to preserve your health; and in this you will better succeed in proportion as you keep clear of the physicians, for their drugs are a kind of alchemy concerning which there are no fewer books than there are medicines.

Darkness is absence of light. Shadow is diminution of light.

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

Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food, you will so conduct yourself in youth that your old age will not lack for nourishment.

Oysters open completely when the moon is full; and when the crab sees one it throws a piece of stone or seaweed into it and the oyster cannot close again so that it serves the crab for meat. Such is the fate of him who opens his mouth too much and thereby puts himself at the mercy of the listener.

Feathers shall raise men even as they do birds towards heaven : That is by letters written with their quills.

In time and with water, everything changes.

Let proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.

You don’t get into trouble because of the things you don’t know. It is the things you don’t know you don’t know that really get you into a mess.