Introduction

Abstract

Plato, but not Socrates, concluded that the Forms are substances.¹ Whether the Forms are substances is not an issue that Socrates had in mind. He did not deny it, but neither did he affirm it. If Socrates were asked a series of questions designed to determine whether he believed that the Forms are substances, he would admit that he had no opinion about this philosophical issue. Unlike Plato, Socrates was not a metaphysician. The same, of course, would not have always been true of Plato. Unlike Socrates, he was a metaphysician. At some point in his career, and at least by the time of the Phaedo and the Republic, Plato did what Socrates never thought to do. Plato considered the question and concluded that the Forms are substances.