*15* V. You see here, Marcus, my son, the very form and as it were the face of Moral Goodness; "and if," as Plato says, "it could be seen with the physical eye, it would awaken a marvellous love of wisdom." #The four Cardinal Virtues.# But all that is morally right rises from some one of four sources: it is concerned either (1) with the full perception and intelligent development of the true; or (2) with the conservation of organized society, with rendering to every man his due, and with the faithful discharge of obligations assumed; or (3) with the greatness and strength of a noble and invincible spirit; or (4) with the orderliness and moderation of everything that is said and done, wherein consist temperance and self-control. #Their several provinces.# *(15)* Although these four are connected and interwoven, still it is in each one considered singly that certain definite kinds of moral duties have their origin: in that category, for instance, which was designated first in our division and in which we place wisdom and prudence, belong the search after truth and its discovery; and this is the peculiar province of that virtue. *16* For the more clearly anyone observes the most essential truth in any given case and the more quickly and accurately he can see and explain the reasons for it, the more understanding and wise he is generally esteemed, and justly so. So, then, it is truth that is, as it were, the stuff with which this virtue has to deal and on which it employs itself. *17* Before the three remaining virtues, on the other hand, is set the task of providing and maintaining those things on which the practical business of life depends, so that the relations of man to man in human society may be conserved, and that largeness and nobility of soul may be revealed not only in increasing one's resources and acquiring advantages for one's self and one's family but far more in rising superior to these very things. But orderly behaviour and consistency of demeanour and self-control and the like have their sphere in that department of things in which a certain amount of physical exertion, and not mental activity merely, is required. For if we bring a certain amount of propriety and order into the transactions of daily life, we shall be conserving moral rectitude and moral dignity.