XIII. Of the Aire.
XIIII. Of Meat and Drink
XV. Of Motion and Rest.
XVI. Of Sleepe and Watching.
XVII. Of Repletion, and Imanition, or Emptiness.
XVIII. Of the Perturbations, or Passions of the mind
XIX. Of things against Nature, and first of the Cause of a Disease
XX. Of a Disease
XXI. Of a Symptome.
XXII. Of Indications.
XXIII. Of Certaine wonderfull and extravagant wayes of Curing diseases.
XXIIII. Of Certaine jugling and deceiptfull wayes of Curing.
The things which we must not treate of, have by the latter Physitions beene termed, not naturall; because they are not of the number of those which enter into the constitution, or composure of mans body; as the elements, humors, and all such things which we formerly comprehended under the name of naturall: although they be such as are necessary to preserve and defend the body already made and composed. Wherefore they were called by Galen Preservers, because by the due use of them the body is preserved in health. Also they may be called doubtfull; but inconsiderately, they cause diseases. Whereby it comes to passe that they may be thought to pertaine to that part of Phisicke which is of preserving health, not because some of these things should be absolutely and of their owne nature wholsome, and other unwholsome, but only by this, that they are, or prove so by their convenient, or preposterous use.
Therefore we consider the use of such like things from 4 conditions, quantitie, quality, occasion, and manner of using; if thou shalt observe these, thou shalt atraine and effect this, that those things which of themselves are as it were, doubtfull, shall bring certaine and undoubted health. For these four circumstances do so far extend, that in them as in the perfection of art, the rules which may be prescribed to preserve health are contained. But Galen in another place hath in four words comprehended these things not natural; as things taken, applyed, expelled, and to be done. Things Taken are those which are put into the body, either by the mouth or any other way, as the Aire, meate, and drinke. Things Applyed are those which must touch the body, as the Aire now mentioned, affecting the body with a diverse touch of its qualityes of heat, cold, moysture or drynesse. Expelled are, what things soever being unprofitable are generated in the body and require to be expelled. To be Done are labour, rest, sleepe, watching and the like. We may more distinctly and by expression of proper names revoke all these things to fixe, which are:
Aire,
Meat and Drinke,
Labour and Rest,
Sleepe and Watching,
Repletion and Inanition, or things to be expelled, or retained and kept,
Perturbations of the Minde.