Prudence, moreover, does not deal in general propositions only, but implies knowledge of particular facts also; for it issues in action, and the field of action is the field of particulars.

This is the reason why some men that lack [scientific] knowledge are more efficient in practice than others that have it, especially men of wide experience; for if you know that light meat is digestible and wholesome, but do not know what meats are light, you will not be able to cure people so well as a man who only knows that chicken is light and wholesome.

But prudence is concerned with practice; so that it needs knowledge both of general truths and of particular facts, but more especially the latter.

But here also [ i.e. in the domain of practice] there must be a supreme form of the faculty [which we will now proceed to consider].