In the initial verses of Seven against Thebes, Eteocles recognizes the need of pronounce the right words as one of his duties as leader and defender of the city of Thebes. The concerns of Eteocles for what ought, or ought not, be said towards an imminent attack comes from a perception of language as a divine form of the world which base itself on the belief among the Greeks that words have a numen in itself and leads, thus, to a (...) prophetic fulfillment. The aim of this paper is, therefore, reveal the contribution of the word to the defense of the city in Seven against Thebes, by Aeschylus. (shrink)