The first inquiry is: How can we imagine a genuinely new creation, something created that was not already contained within God prior to Creation? After all, it is clear to anyone who investigates that there is nothing that is not already included within Him. Furthermore, it is evident that nothing can produce what is not already contained within it.
The second inquiry is: Let us grant that, as an omnipotent being, God can create ex nihilo, i.e., something completely new that is not already contained in any way in God. Still, we must ask: What exactly is that “something” that God could choose to create without it being already contained within Him, but is instead entirely new?