Chapter 4, together with Chapter 5, focuses on the third level of lexis and the ἀρετὴ τῆς λέξεως (the excellence of lexis). Since Aristotle devotes much attention to this characteristic of lexis, the discussion of this third level of lexis has been divided into two chapters: Chapter 4 deals with the intra-textual aspect of Aristotle’s remarks on lexis as a means for the creation of different kinds of poetry and rhetoric, i.e. lexis as technē; in Chapter 5 extra-textual factors are considered and are followed by a discussion of the purpose and function of lexis on its third level.