Science begets knowledge; opinion, ignorance.

Any man who is intelligent must, on considering that health is of the utmost value to human beings, have the personal understanding necessary to help himself in diseases, and be able to understand and to judge what physicians say and what they administer to his body, being versed in each of these matters to a degree reasonable for a layman.

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.

Science is the father of knowledge, but opinion breeds ignorance.

We must turn to nature itself, to the observations of the body in health and in disease to learn the truth.

The physician treats, but nature heals.

Many admire, few know.