Of Medicine in Eight Books

As agriculture promises food to the healthy, so medicine promises health to the sick. There is no place in the world, where this art is not found: for even the most barbarous nations are acquainted with herbs, and other easy remedies for wounds and diseases. However it has been more improved by the Greeks than any other people: though not from the infancy of that nation, but only a few ages before our own times; as appears by their celebrating Æsculapius as its most ancient author; who, because he cultivated this science with somewhat more accuracy, which, before him, was rude and of low esteem, was received into the number of their gods. After him his two sons, Podalirius and Machaon, following Agamemnon to the Trojan war, were not a little useful to their fellow soldiers. But even these, according to Homer’s account, did not undertake the plague, nor the other various kinds of diseases, but only cured wounds by incisions, and medicines: from which it appears, that they entirely confined themselves to the chirurgical part of medicine, and that this was the most antient branch. From the same author we may also learn, that diseases were then believed to arise from the anger of the immortal gods, and that relief used to be sought from them. It is also probable, that though there were few remedies for distempers known, men nevertheless generally enjoyed good health from the sobriety of their lives, yet untainted by sloth and luxury. For these two vices, first in Greece, and then among us, rendered men liable to many diseases. And hence that variety of remedies now used, which was neither necessary in ancient times, nor is yet in other nations, scarcely protracts the lives of a few of us to the verge of old age. For the same reason, after those, whom I have mentioned, no men of eminence practised medicine, till learning began to be pursued with greater application; which, as it is of all things most necessary to the mind, so it is no less hurtful to the body. And at first the science of healing was accounted a branch of philosophy; so that the cure of diseases, and the study of nature, owed their rise to the same persons: and for this very good reason, because they, who had impaired their bodies by anxious thought, and nightly watchings, stood most in need of its assistance. And thus we find, that many amongst the philosophers were skilled in this science; of whom the most celebrated were Pythagoras, Empedocles, and Democritus. Hippocrates of Cos, who, according to some authors, was the disciple of the last mentioned of these, and is so justly admired both for his knowledge in this profession, and for his eloquence, was the first worthy of notice, who separated medicine from the study of philosophy. After him, Diocles the Carystian, then Praxagoras and Chrysippus; after these, Herophilus and Erasistratus applied themselves to this art, and differed widely from each other in their methods of cure.