An entity is finite or infinite by reason of its own intrinsic degree of perfection, not by something accidental to itself

Scotus ascribes to Aquinas the following argument for the divine infinity: If a form is limited by matter, it is finite. God, being simple, is not limited by matter. Therefore, God is not finite. This, as Scotus points out, is a fallacious argument. (It’s an instance of denying the antecedent.) But even apart from the fallacy, simplicity is not going to get us infinity. As Scotus puts it: “if an entity is finite or infinite, it is so not by reason of something accidental to itself, but because i