It is said that a wise man rules over the stars, but this does not mean that he rules over the influences which come from the stars in the sky. It means that he rules over the powers which exist in his own constitution.

What the eyes perceive in herbs or stones or trees is not yet a remedy; the eyes see only the dross.

For one country is different from another; its earth is different, as are its stones, wines, bread, meat, and everything that grows and thrives in a specific region.

The book of Nature is that which the physician must read; and to do so he must walk over the leaves.

Women's regular bleeding engenders phantoms.

Nature also forges man, now a gold man, now a silver man, now a fig man, now a bean man.

A little bit of beer is divine medicine.