The Republic by Plato Part 3 Page 36

I should imagine that he will like to personate him, and will not be ashamed of this sort of imitation: he will be most ready to play the part of the good man when he is acting firmly and wisely; in a less degree when he is overtaken by illness or love or drink, or has met with any other disaster.

But when he comes to a character which is unworthy of him, he will not make a study of that; he will disdain such a person, and will assume his likeness, if at all, for a moment only when he is performing some good action; at other times he will be ashamed to play a part which he has never practised, nor will he like to fashion and frame himself after the baser models; he feels the employment of such an art, unless in jest, to be beneath him, and his mind revolts at it.

So I should expect, he replied.