Seven Against Thebes
Previous to both Romans, Aeschylus used a similar phrase in "Seven Against Thebes" at line 592, at which the scout ("angelos") says of the seer/priest Amphiaraus: ("ou gàr dokeîn áristos, all' eînai thélei": "he doesn't want to "seem", but to "be" the bravest"). Plato quoted this line in "Republic" (361b).