Original-language term or English translation acceptable. Ancient views of this concept’s “secrets” are divided into Promethean and Orphic attitudes in Pierre Hadot’s (-5[1])(“ah-DOH’s”) The Veil of Isis. The Sophists were among those who debated the roles of this concept and nomos, or “law.” Aristotle wrote (10[1])in De Anima that this concept “does nothing in vain.” An aphorism by Heraclitus claims that this concept “loves to hide.” In a poem titled for this concept, a winged chariot takes the narrator to a goddess who describes the “Way of Truth” and the “Way of Opinion.” This concept titles (10[1])the major fragmentary texts by several pre-Socratics, (-5[1])including Heraclitus and Parmenides. (10[1])Aristotle is often credited with introducing the idea that this concept “abhors a vacuum.” For 10 points, in the Latin title of a work by Lucretius, what concept follows “De rerum”? (10[1])■END■ (10[1])