On Aristotle "On the Heavens 1.10-12" - Ancient Commentators on Aristotle

Here is a battle royal between the Neoplatonist Simplicius and the Aristotelian Alexander on the origins, if any, of the universe. A parallel battle had already been conducted by Philoponus and Proclus, arguing that Plato's "Timaeus" gives a beginning to the universe. Simplicius denies this.