Video from The Thomistic Institute
Form and Matter (Aquinas 101)
"What is truth? What is love? What is justice? In asking the question, one asks for the essences of things, or more simply, what they are. The ancient philosopher Plato called the answers to these questions the “forms.” Aristotle believed in the forms, but saw them as existing in things themselves. Thus, all things of nature are composed of matter and form, and this composite constitution is called hylomorphism. Form and Matter (Aquinas 101) - Fr. James Brent, O.P." from video introduction.