In the fourth century bce, Greek thinkers first articulated the idea that supreme wisdom takes the form of theoria. These philosophers defined their new conception of knowledge in different ways, using different modes of discourse. In addition to offering philosophic analyses and discussions of theoria, the fourth-century philosophers employed powerful rhetoric in the attempt to define this new intellectual practice. None offered a completely neutral or analytic account of theoretical activity; all developed what G. E. R. Lloyd calls “a discourse, or one might say a rhetoric, of legitimation.” In this chapter, I will examine one of the central strategies deployed in the attempt to conceptualize and legitimize philosophic theoria, namely, the frequent use of the discourse and structures of traditional theoria.