Where prayer, amulets and incantations work it is only a manifestation of the patient's belief.

Men think epilepsy divine, merely because they do not understand it. We will one day understand what causes it, and then cease to call it divine. And so it is with everything in the universe.

And if this were so in all cases, the principle would be established, that sometimes conditions can be treated by things opposite to those from which they arose, and sometimes by things like to those from which they arose.

There are, in effect, two things, to know and to believe one knows; to know is science; to believe one knows is ignorance.

There is one common flow, one common breathing, all things are in sympathy.

All excesses are inimical to Nature. It is safer to proceed a little at a time, especially when changing from one regimen to another.

The art has three factors, the disease, the patient, the physician. The physician is the servant of the art. The patient must cooperate with the physician in combatting the disease.