The works which have survived are his commentaries upon Aristotle's de Caelo, Physica Auscultatio, and Categories, as well as a commentary upon the Enchiridion of Epictetus.
Simplicius, as a Neoplatonist, endeavoured to show that Aristotle agrees with Plato even on those points which he controverts, so that he may lead the way to their deeper, hidden meaning.