It would be a pleasure to me, most learned professor of morality, whom to address by the tender name of father-in-law is my greatest happiness; it would be a pleasure to me, I say, to treat to the best of my abilities of the connexion between the knowledge of morals and of health; how near the relation is between them, how exact the concatenation in every respect. This is certainly both an agreeable and useful undertaking: nor is it altogether new; for HIPPOCRATES has in his whole treatise concerning diet, done his utmost to prove that souls are the same in all men, and that the various degrees of wisdom and folly proceed from the different temperament of their bodies; and GALEN, who has admirably demonstrated the power of the body over the mind and the motions of the will, desired the teachers of philosophy, sixteen ages ago, to send all persons of bad morals to him to be cur’d[1]. Should I be ever so full, most learned professor of jurisprudence, I could not entirely display the connexion between us; for whether a legislator regulates a commonwealth, or whether a judge upon the bench weighs questions of civil law, or criminal and ecclesiastical causes, in the ballance of Themis, there occur cases, and those not a few, in which he cannot do without the assistance of our art. It would be necessary to lay open the greatest part of natural knowledge, most profound professor of philosophy, were I to treat of all that it has in common with physick; for you well know that both the cure of diseases, and the contemplation of the nature of things, had their beginnings from the same authors. We are therefore inform’d that many of the professors of natural philosophy were well skilled in physick, and that the most illustrious of these were PYTHAGORAS, EMPEDOCLES, and DEMOCRITUS. HIPPOCRATES was the first who separated these studies; but he did not separate them in such a manner as to pull them asunder entirely, but so as to split that comprehensive science into several more minute members, that many might cultivate divided, what one could not learn entire; but that neither should desert what nature made inseparable.