for two reasons:

The first is that something newly occurring cannot arise from an eternal, beginningless and everlasting cause without something newly occurring. This is a principle they themselves affirm.

We then say: If something newly occurring can arise from what is beginningless, then He can act after not having acted, and it necessarily follows that He knows the things brought into being. If that is not possible, then no newly occurring thing can arise from the eternal, complete cause, and nothing can come into being in the world.

Once the notion that the world is created by an eternal cause without having come into being from it is refuted, it follows that events occur when the cause necessitating their occurrence becomes complete. This happens through the coming into being of what completes that necessitating cause. This, in turn, goes back to matters subsisting in Him and connected to His will and power. He must therefore know them, since this knowledge is a necessary concomitant of His very being, and since they cannot exist without His knowledge of them.

Moreover, events proceed from Him, whether through an intermediary or without one. If He did not know them in the manner in which they came into being, He would not know their complete cause, which necessarily entails their occurrence. Knowledge of the complete cause necessarily entails knowledge of the effect. Thus, if knowledge of the effect is supposed to be absent, knowledge of the complete cause must also be absent. If knowledge of the complete cause is impossible, knowledge of the cause of that cause must likewise be absent, until it follows that He lacks complete knowledge of Himself.

If He is supposed to know Himself, it necessarily follows that He knows every event in the manner in which it came into being, and that He knows every particular, because He is the one who brings it about in that manner—even if this is by way of necessary entailment. For His knowing that which entails something else is like His bringing it about: complete knowledge of it necessitates knowledge of all that it entails, as explained earlier.