Rhetoric is one of the arts of using language as a means to persuade. Along with grammar and logic or dialectic, rhetoric is one of the three ancient arts of discourse From ancient Greece to the late 19th Century, it was a central part of Western education, filling the need to train public speakers and writers to move audiences to action with arguments. The very act of defining has itself been a central part of rhetoric, appearing among Aristotle's Topics. The word is derived from the Greek (rhetorikós), "oratorical", from "public speaker", related to "that which is said or spoken, word, saying", and ultimately derived from the verb "to speak, say". In its broadest sense, rhetoric concerns human discourse.