Nicomachean Ethics

There is too the faculty of Judiciousness, and also its absence, in virtue of which we call men Judicious or the contrary.

Now Judiciousness is neither entirely identical with Knowledge or Opinion (for then all would have been Judicious), nor is it any one specific science, as medical science whose object matter is things wholesome; or geometry whose object matter is magnitude: for it has not for its object things which always exist and are immutable, nor of those things which come into being just any which may chance; but those in respect of which a man might doubt and deliberate.

And so it has the same object matter as Practical Wisdom; yet the two faculties are not identical, because Practical Wisdom has the capacity for commanding and taking the initiative, for its End is “what one should do or not do:” but Judiciousness is only apt to decide upon suggestions (though we do in Greek put “well” on to the faculty and its concrete noun, these really mean exactly the same as the plain words), and Judiciousness is neither the having Practical Wisdom, nor attaining it: but just as learning is termed συνιέναι when a man uses his knowledge, so judiciousness consists in employing the Opinionative faculty in judging concerning those things which come within the province of Practical Wisdom, when another enunciates them; and not judging merely, but judging well (for εὐ and καλῶς mean exactly the same thing). And the Greek name of this faculty is derived from the use of the term συνιέναι in learning: μανθάνειν and συνιέναι being often used as synonymous.

The faculty called γνώμη,[40] in right of which we call men εὐγνώμονες, or say they have γνώμη, is “the right judgment of the equitable man.” A proof of which is that we most commonly say that the equitable man has a tendency to make allowance, and the making allowance in certain cases is equitable. And συγγνώμη (the word denoting allowance) is right γνώμη having a capacity of making equitable decisions, By “right” I mean that of the Truthful man.