Aristotle, Nicomachean Ethics
H. Rackham, Ed.

we sometimes praise a man for being ambitious, sometimes for being unambitious. [9] Why we do so shall be discussed later; for the present let us classify the remaining virtues and vices on the lines which we have laid down. [10]

In respect of anger also we have excess, deficiency, and the observance of the mean. These states are virtually without names, but as we call a person of the middle character gentle, let us name the observance of the mean Gentleness, while of the extremes, he that exceeds may be styled irascible and his vice Irascibility, and he that is deficient, spiritless, and the deficiency Spiritlessness. [11]

There are also three other modes of observing a mean which bear some resemblance to each other, and yet are different; all have to do with intercourse in conversation and action, but they differ in that one is concerned with truthfulness of speech and behavior, and the other with pleasantness, in its two divisions of pleasantness in social amusement and pleasantness in the general affairs of life. We must then discuss these qualities also, in order the better to discern that in all things the observance of the mean is to be praised, while the extremes are neither right nor praiseworthy, but reprehensible. Most of these qualities also are unnamed, but in these as in the other cases we must attempt to coin names for them ourselves, for the sake of clearness and so that our meaning may be easily followed. [12]

In respect of truth then, the middle character may be called truthful, and the observance of the mean Truthfulness¹; pretence in the form of exaggeration is Boastfulness, and its possessor a boaster; in the form of understatement, Self-depreciation, and its possessor the self-depreciator. [13]

In respect of pleasantness and social amusement, the middle character is witty and the middle disposition Wittiness; the excess is Buffoonery and its possessor a buffoon; the deficient man may be called boorish, and his disposition Boorishness. In respect of general pleasantness in life, the man who is pleasant in the proper manner is friendly, and the observance of the mean is Friendliness; he that exceeds, if from no interested motive, is obsequious, if for his own advantage, a flatterer; he that is deficient, and unpleasant in all the affairs of life, may be called quarrelsome and surly. [14]

There are also modes of observing a mean in the sphere of and in relation to the emotions. For² in these also one man is spoken of as moderate and another as excessive—for example the bashful man whose modesty takes alarm at everything; while he that is deficient in shame, or abashed at nothing whatsoever, is shameless, and the man of middle character modest. For though Modesty is not a virtue, it is praised, and so is the modest man.