Know that the philosopher has power over the stars, and not the stars over him.

The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.

The physician must give heed to the region in which the patient lives, that is to say, to its type and peculiarities.

Know that the philosopher has power over the stars, and not the stars over him.

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

It would be an error to try to build the Kingdom of Heaven upon envy. For nothing that is founded on envy can thrive; it must have another root.

It should be forbidden and severely punished to remove cancer by cutting, burning, cautery, and other fiendish tortures. It is from nature that the disease comes, and from nature comes the cure, not from physicians.