Apollophanes'
natural philosophy is similar to
Poseidonius', that the world is one and finite, having a spherical form with a vacuum around it. Among the Stoics, there was much discussion concerning the number of virtues and parts of the soul. On the number of virtues
Cleanthes,
Chrysippus, and
Antipater suggest that there are many;
Poseidonius suggests that there are four; traditional Stoics suggest that there are three (the logical, the natural, and the ethical);
Panaetius teaches that there are only two (the speculative and the practical); while Apollophanes taught that there is only one virtue – prudence. On the parts of the soul Plato divided it into two parts; Zeno into three; Panaetius into five or six; Soranus into seven; Chrysippus into as many as eight; Apollophanes into as many as nine; while other Stoics declared as many as twelve parts in the soul. ==Works==