Epictetus 3.22.5-9
" You are the sun; you have the power, as you make the circuit of the heavens, to produce the year and the seasons, to give increase and nourishment to the fruits, to stir and to calm the winds, and to give warmth in moderation to the bodies of men; arise, make the circuit of the heavens, and so set in motion all things from the greatest to the least. You are a calf; when a lion appears, do what is expected of you; otherwise you will smart for it. You are a bull; come on and fight, for this is expected of you, it befits you, and you are able to do it. You are able to lead the host against Ilium; be Agamemnon. You are able to fight a duel with Hector; be Achilles." But if Thersites came along and claimed command, either he would not have got it, or if he had, he would have disgraced himself in the presence of a multitude of witnesses. So do you also think about the matter carefully; it is not what you think it is.