This course will examine metaphysics from within the Aristotelian-Thomistic tradition. To explore just what metaphysics is, we will engage Aristotle’s texts along with St. Thomas’ commentaries on them. In the first semester, we will begin with Aristotle’s Categories. We will then consider Thomas’ s introduction to his commentary on Aristotle’s Metaphysics, as well as the several books of the Metaphysics itself, namely Books Alpha, Alpha elasson, Gamma, Delta, Epsilon, Zeta, Eta, and Theta. We will consider first philosophy as wisdom and as a science, Aristotle’s critiques of other philosophers, the knowledge of the truth, causal explanations, aporiæ and doubt, and axioms, as well as fundamental concerns such as substance, essence, potency, and act.