Rest as soon as there is pain.

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

If we could give every individual the right amount of nourishment and exercise, not too little and not too much, we would have found the safest way to health.

The body of man has in itself blood, phlegm, yellow bile and black bile; these make up the nature of this body, and through these he feels pain or enjoys health. Now he enjoys the most perfect health when these elements are duly proportioned to one another in respect of compounding, power and bulk, and when they are perfectly mingled.

Life is short, and the Art long; the occasion fleeting; experience fallacious, and judgment difficult. The physician must not only be prepared to do what is right himself, but also to make the patient, the attendants, and externals cooperate.

War is the only proper school of the surgeon.

Whenever a doctor cannot do good, he must be kept from doing harm.