 The Neoplatonic commentaries of late Antiquity represent rather sophisticated readings of Plato and Aristotle, integrating a rich prehistory of exegesis and philosophical debate, but also structured according to certain well-defined rules and methods. Since Simplicius comes almost at the end of this tradition, his commentaries are also a repository from which such constituent parts of Platonic exegetical practices can be reconstructed. Generally speaking, both ancient and medieval commentators share a nondevelopmentalist approach to their authors and treat single works as part of a greater philosophical whole or system. Simplicius’ main aim is to clarify the Aristotelian text, explain Aristotle by means of his own writings, and demonstrate the harmony of Plato, Aristotle and older pre-Socratic traditions.