But the mean relatively to ourselves must not be so found ; for it does not follow, supposing ten minæ58 is too large a quantity to eat and two too small, that the trainer will order his man six; because for the person who is to take it this also may be too much or too little: for Milo it would be too little, but for a man just commencing his athletic exercises too much: similarly too of the exercises themselves, as running or wrestling.
So then it seems every one possessed of skill avoids excess and defect, but seeks for and chooses the mean, not the absolute but the relative.
Now if all skill thus accomplishes well its work by keeping an eye on the mean, and bringing the works to this point (whence it is common enough to say of such works as are in a good state, “one cannot add to or take ought from them,” under the notion of excess or defect destroying goodness but the mean state preserving it), and good artisans, as we say, work with their eye on this, and excellence, like nature, is more exact and better than any art in the world, it must have an aptitude to aim at the mean.
It is moral excellence, i.e. Virtue, of course which I mean, because this it is which is concerned with feelings and actions, and in these there can be excess and defect and the mean: it is possible, for instance, to feel the emotions of fear, confidence, lust, anger, compassion, and pleasure and pain generally, too much or too little, and in either case wrongly; but to feel them when we ought, on what occasions, towards whom, why, and as, we should do, is the mean, or in other words the best state, and this is the property of Virtue.
In like manner too with respect to the actions, there may be excess and defect and the mean. Now Virtue is concerned with feelings and actions, in which the excess is wrong and the defect is blamed but the mean is praised and goes right; and both these circumstances belong to Virtue. Virtue then is in a sense a mean state, since it certainly has an aptitude for aiming at the mean.