And now, we’ve come to the real core of his disagreement with Proclus. Philoponus objects to the idea that God is forced to create a universe at all, that he produces what comes after him necessarily, as Neoplatonists have been saying since Plotinus. This explains Philoponus’ relentless attention to the eternity question: he is trying to safeguard the idea that God freely bestows existence on a universe that would otherwise not exist.

