Iacobi Acontii Tridentini de methodo, hoc est, de recta investigandarum, tradendarumque artium, ac scientiarum ratione

medicines, diseases, and the rest, about which the physician is occupied, are the matter of the physician, and the war is the matter of that speech which treats of war. Thus, the matter of buying and selling will be that which is bought and sold. "First," says Quintilian, "one must consider who speaks, in what cause, before whom, against whom, and what he says." We believe that all these—in what cause, before whom, and what he says—pertain to nothing other than the matter and subject of the speech. Similarly, there is something in accidents in which they consist, so that the thing becomes what it is, just as in a contract of buying and selling there is the agreement of price, from which it has that it becomes a purchase and sale, and this will be accepted as the form.

The condition of efficient causes is twofold. For some accompany the effect perpetually, such as those that are internal; others can be absent, such as those which we call evident and external, just as the heat of the sun is the cause of a daily fever, even if it has ceased from burning. Moreover, some act by the necessity of nature, some by the will of the maker. Those which lack counsel and judgment follow necessity, such as fire: given that it can burn, it cannot not burn; but those act by choice which are free to act or not