CHAP. I. What things appertaine to the Doctrine of the pre∣servation of Health, and how many kinds there are of necessary causes for the preservation and defence thereof.
HItherto we have explained three parts of Physick, which, as it were, prepare the way to those things which are proper to Medicine: Now the next is, that we explaine those principall parts of Physick, the Hygeeinall and Therapeuticall, or the preser∣vative and restorative; yet first of all we will place before hand certaine common Axioms and Maximes to be observed in the method of them both.
1. Nature doth nothing rashly.
2. Too much of any thing is an enemy to Nature, * 1.1 2. A∣pho. 51.
3. Nature is the Physitian of Diseases, but the Physitian the Servant of Nature, and ought to imitate her, she acting aright:
4. Custome is a second Nature, and those things which