Objects

The Objects of the Act of Prudence.—(a) Prudence is concerned, not with speculative truth (i.e., with those things that are known for the sake of knowledge), but with practical truth (i.e., with those things that are known for the sake of use). It aims, not to investigate and discover what is the nature of virtue, but to guide man so that he may become virtuous and practise virtue. It should be noted, however, that the acts of the speculative reason, although they do not belong to prudence itself, are like other acts subject to the direction of prudence; for in pursuing speculative studies one should use good judgment as to the subjects to be considered, the time, place, manner, etc., of study.

(b) Prudence is not concerned with necessary truths and first principles of morality, but with their application to contingent and particular cases, just as a physician is called on to cure, not a universal or abstract man, but the particular and individual man before him. But since one cannot well apply that of which one is ignorant, the prudent man must be acquainted both with the general rules of right living and with the particular things to which his knowledge is to be applied. He lacks prudence, therefore, who from vincible ignorance does not know a general principle (e.g., that too much drink is bad), or a case to which that principle should be applied (e.g., that the quantity of drink before one is too much).

It is customary to distinguish a twofold object of a virtue, namely, the material object (i.e., the kind of activity the virtue perfects, whether in the field of knowledge, or of action, or of production) and the formal object (i.e., the special viewpoint of goodness from which the material object is considered).

(a) The material object of prudence embraces individual human actions performed under choice and freely (agibilia). (b) The formal object of prudence is the right deliberation, decision, and direction (recta ratio) to be given to human actions, with a view to the observance of the golden mean.