Lucian De saltatione 84

[84] Moreover, the man himself, they say, once he had returned to his sober senses, was so sorry for what he had done that he really became ill through distress and in all truth was given up for mad. Indeed, he himself showed his repentance clearly, for when his supporters asked him to dance Ajax for them once more, begging to be excused, he said to the audience, “For an actor, it is enough to have gone mad once!” ¹ What irked him most was that his antagonist and rival, when cast for Ajax in the same role, enacted his madness so discreetly and sanely as to win praise, since he kept within the bounds of the dance and did not debauch the histrionic art.

[84] However, it seems that when he came to his senses again he bitterly repented of this exploit, and was quite ill from grief, regarding his conduct as that of a veritable madman, as is clear from his own words, For when his partisans begged him to repeat the performance, he recommended another actor for the part of Ajax, saying that ‘it was enough for him to have been mad once.’ His mortification was increased by the success of his rival, who, though a similar part had been written for him, played it with admirable judgement and discretion, and was complimented on his observance of decorum, and of the proper bounds of his art.