15. Besides, it is profitable for him who visits his friends in their sickness to enquire after the causes of it. Let us not sophistically or impertinently discourse about lodgements, irruptions of blood, and commonplaces, merely to show our skill in the terms of art which are used in medicine. But when we have with diligence heard such trivial and common things discoursed of as fulness or emptiness, weariness, lack of sleep, and (above all) the diet which the patient kept before he fell sick, then,—as Plato used to ask himself, after the miscarriage of other men he had been with, Am not I also such a one?—so ought we to take care by our neighbor’s misfortunes, and diligently to beware that we do not fall into them, and afterwards cry out upon our sick-bed, How precious above all other things is health! When another is in sickness, let it teach us how valuable a treasure health is, which we ought to keep and preserve with all possible care. Neither will it be amiss for every man to look into his own diet. If therefore we have been eating, drinking, laboring, or doing any thing to excess, and our bodies give us no suspicion or hint of a distemper, yet ought we nevertheless to stand upon our guard and take care of ourselves,—if it be after venery and labor, by giving of ourselves rest and quiet; if after drinking of wine and feasting, by drinking of water; but especially, after we have fed on flesh or solid meats or eaten divers things, by abstinence, that we may leave no superfluity in our bodies; for these very things, as they are the cause of many diseases, likewise administer matter and force to other causes. Wherefore it was very well said, that to eat—but not to satiety, to labor—but not to weariness, and to keep in nature, are of all things the most healthful. For intemperance in venery takes away that by which vigor our nourishment is elaborated, and causes more superfluity and redundance.