To judge kata ton orthon logon is indeed to judge of more or less and Aristotle tries to use the notion of a mean between the more and the less to give a general characterization of the virtues: courage lies between rashness and timidity, justice between doing injustice and suffering injustice, liberality between prodigality and meanness. For each virtue therefore there are two corresponding vices. And what it is to fall into a vice cannot be adequately specified independently of circumstances: the very same action which would in one situation be liberality could in another be prodigality and in a third meanness. Hence judgment has an indisputable role in the life of the virtuous man which does not and could not have in, for example, the life of the merely law-abiding or rule-abiding man.
–Alasdair MacIntyre, After Virtue, Page 144