5
But, forasmuch as philosophers do not make all virtue to consist in a mediocrity nor call it moral, to show the difference more clearly, it will be necessary to take our rise a little farther off. For of all things then in the universe, some do exist absolutely, simply, and for themselves only; others again relatively, for and with regard to us. Among those things which have an absolute and simple existence are the earth, the heavens, the stars, and the sea; and of such things as have their being relatively, with respect to us, are good and evil, things desirable and to be avoided, and things pleasant and hurtful. And seeing that both are the proper objects of reason,—while it considers the former, which are absolutely and for themselves, it is scientifical and contemplative; and when the other, which have reference to us, it is deliberative and practical. And as the proper virtue in the latter case is prudence, in the former it is science. And between the one and the other, namely, between prudence and science, there is this difference. Prudence consists in a certain application and relation of the contemplative faculties of the soul to those which are practical, for the government of the sensual and irrational part, according to reason. To which purpose prudence has often need of Fortune; whereas neither of that nor of deliberation has science any occasion or want to attain its ends, forasmuch as it has nothing to consider but such things as remain always the same. For as a geometrician never deliberates about a triangle, whether all its three angles be equal to two right angles, because of that he has a clear and distinct knowledge (and men use to deliberate about such things only as are sometimes in one state or condition and sometimes in another, and not of those which are always firm and immutable), so the mind, when merely contemplative, exercising itself about first principles and things permanent, such as retaining the same nature are incapable of mutation, has no room or occasion for deliberation. Whereas prudence, descending to actions full of error and confusion, is very often under the necessity of encountering with fortuitous accidents, and, in doubtful cases, of making use of deliberation, and, to reduce those deliberations into practice, of calling also to its assistance even the irrational faculties, which are (as it were) forcibly dragged to go along with it, and by that means to give a certain vigor or impetus to its determinations. For its determinations do indeed want something which may enliven and give them such an impetus. And moral virtue it is which gives an impetus or vigor to the passions; but at the same time reason, which accompanies that impetus, and of which it stands in great need, does so set bounds thereunto, that nothing but what is moderate appears, and that it neither outruns the proper seasons of action, nor yet falls short of them.
