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

The art of medicine cannot be inherited, nor can it be copied from books

Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.

As you talk, so is your heart.

Once a disease has entered the body, all parts which are healthy must fight it: not one alone, but all. Because a disease might mean their common death. Nature knows this; and Nature attacks the disease with whatever help she can muster.

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

The ultimate cause of human disease is the consequence of our transgression of the universal laws of life.