 The fact that each discipline had its own form of reasoning did not mean they could not be compared or did not point to an ultimate unity. According to Lefèvre, Aristotle also taught that disciplines bore an analogical relationship to one another—the distinctive method of each discipline was the starting-point to this higher knowledge. Frequently he (and his students after him) alerted readers to what they believed were “traces” (vestigia) or “analogies” (analogiae) which could help them to find the deeper unity beneath apparently diverse phenomena. In his earliest introduction to natural philosophy, Lefèvre claimed that there was a