An action is either represented on the stage, or being done elsewhere is there related. The things which enter by the ear affect the mind more languidly, than such as are submitted to the faithful eyes, and what a spectator presents to himself. You must not, however, bring upon the stage things fit only to be acted behind the scenes: and you must take away from view many actions, which elegant description may soon after deliver in presence[ of the spectators]. Let not Medea murder her sons before the people; nor the execrable Atreus openly dress human entrails: nor let Progue be metamorphosed into a bird, Cadmus into a serpent. Whatever you show to me in this manner, not able to give credit to, I detest. 