many questions in natural philosophy which are easy to discuss and to decide; there are many disquisitions which relate to manners, which please the mind (as Homer expresses it) and do no way discompose it. Questions in history and poetry have been by some ingeniously called a second course to a learned man and a scholar. There are discourses which are no way troublesome; and, besides, fables may be told. Nay, it is easier to discourse of the pipe and lyre, or hear them discoursed of, than it is to hear either of them played on. The quantity of time allowed for this exercise is till our meat be gently settled within us, so that our digestion may have power enough to master it. 21. Aristotle is of opinion that to walk after supper stirs up our natural heat; but to sleep, if it be soon after, chokes it. Others again say that rest aids digestion, and that motion disturbs it. Hence some walk immediately after supper; others choose rather to keep themselves still. But that man seems to obtain the design of both, who cherishes and keeps his body quiet, not immediately suffering his mind to become heavy and idle, but (as has been said) gently distributing and lightening his spirits by either hearing or speaking some pleasant thing, such as will neither molest nor oppress him. 22. Medicinal vomits and purges, which are the bitter reliefs of gluttony, are not to be attempted without great necessity. The manner of many is to fill themselves because they are empty, and again, because they are full, to empty themselves contrary to nature, being no less tormented with being full than being empty; or rather, they are troubled at their fulness, as being a hindrance of their appetite, and are always emptying themselves, that they may make room for new enjoyment. The damage in these cases is evident; for the body is disordered and torn by both these. It is an inconvenience that always attends a vomit, that it increases and gives nourishment to this insatiable humor. For it engenders hunger, as violent and turbulent as a roaring torrent, which continually annoys a man, and forces him to his meat, not like a natural appetite that calls for food, but rather like inflammation that calls for plasters and physic. Wherefore his pleasures are short and imperfect, and in the enjoyment are very furious and unquiet; upon which there come distentions, and affections of the pores, and retentions of the spirits, which will not wait for the natural evacuations, but run over the surface of the body, so that it is like an overloaded ship, where it is more necessary to throw something overboard than to take any thing more in. Those disturbances in our bellies which are caused by physic corrupt and consume our inward parts, and do rather increase our superfluous humors than bring them away; which is as if one that was troubled at the number of Greeks that inhabited the city, should call in the Arabians and Scythians.