 Epistemology and ethics belong respectively to Logic and Ethics which, together with Physics, were the three parts of philosophy recognized in the Hellenistic era (cf. Ac. 1, 19). We are better informed about Antiochus’ epistemology and ethical theory than his Physics, which accurately reflects his own priorities, though, as we have seen, he wrote a book about the gods, a subject that belonged to Physics. For firm evidence about Antiochean Physics we we are largely reliant on the brief exposition of the views of the Old Academics and Peripatetics by the Antiochean spokesman, Varro, in Acad. 1 (24–29), who also mentions a few “corrections” by Zeno, which Antiochus may have adopted (1. 39). Here as elsewhere it is hard to tell whether and to what extent the resemblance between Antiochus’ view, according to which material reality is constituted by two things and their interaction, one active, one passive, and Stoic views reflects the influence of the latter on Antiochus or is evidence of an Old Academic influence on Stoicism (see Inwood 2012). 