Is Prime Matter Energy?

This paper tests the hypothesis that prime matter of classical Aristotelian-Scholastic metaphysics is numerically identical to energy. Is P = E? After outlining Aristotelian concept matter, I provide master argument for it, based on phenomenon substantial change. then outline what we know about energy as a scientific concept, including its role and application in some key fields. Next, consider arguments favour being energy, followed by against this. The method used ontological profile comparison: does match, features, energy? An affirmative answer, E, would be momentous discovery: it show one most neglected derided ideas pre-modern metaphysics—a contributor downfall wake Scientific Revolution—was correct all along. From negative still learn much interaction science metaphysics. It turns out, however, given currently know, answer not quite simple might hope.