Read the excerpt from The Iliad of Homer. "I entreat you by your life, by your knees, by your parents, do not let the dogs feed on me by the ships of the Achaians, but take yourself the bronze and gold that are there in abundance, those gifts that my father and the lady my mother will give you, and give my body to be taken home again, so that the Trojans and the wives of the Trojans may give me in death my rite of burning.” What ancient Greek belief does this excerpt best illustrate?