For if Nature takes from dissimilar bodies what is fit and agreeable, the diverse nourishment forces many and sundry qualities into the mass and bulk of the body, applying to every part that which is meet and fit; so that, as Empedocles words it, The sweet runs to the sweet, the sour combines With sour, the sharp with sharp, the salt with salt; and after being mixed it is spread through the mass by the heat, the proper parts are separated and applied to the proper members.

Indeed, it is very probable that such bodies as ours, consisting of parts of different natures, should be nourished and built up rather of various than of simple matter.

But if by concoction there is an alteration made in the food, this will be more easily performed when there are different sorts of meat, than when there is only one, in the stomach; for similars cannot work upon similars and the very contrariety in the mixture considerably promotes the alteration of the weakened qualities.

But if, Philinus, you are against all mixture, do not chide Philo only for the variety of his dishes and sauces, but also for using mixture in his sovereign antidotes, which Erasistratus calls the gods' hands.

Convince him of absurdity and vanity, when he mixes herbs, metals, and animals, and things from sea and land, in one potion; and recommend him to neglect these, and to confine all physic to barley-broth, gourds, and oil mixed with water.