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.

Natural forces within us are the true healers of disease.

Old people have fewer diseases than the young, but their diseases never leave them.

Foolish the doctor who despises the knowledge acquired by the ancients.

Leave your drugs in the chemist's pot if you can heal the patient with food.

I will use treatment to help the sick according to my ability and judgment, but never with a view to injury and wrongdoing. Neither will I administer a poison to anybody when asked to do so, nor will I suggest such a course. Similarly, I will not give to a woman a pessary to cause abortion. I will keep pure and holy both my life and my art.

Many admire, few know.