f my understanding of Aquinas’ argument is correct, then it’s exactly the same as my argument for solipsism.
From the solipsistic perspective, the existence of everything around me necessarily follows from the conscious/intellectual reality that “I am”.
To illustrate, by looking at my computer, I not only know that my computer exists, but I automatically know that other things must exist as well. Like the factory that manufactured the computer, and the people who work in that factory, and the families of those workers, and so on, and so on. In fact, if I follow this line of reasoning to its ultimate conclusion, I’ll likely find that everything else must exist, simply due to the fact that my computer exists.
Then the question becomes, if I can know that everything else exists simply from the existence of my computer, then just how little information must I begin with in order to know that everything else must exist as well?
Ultimately, can I simply begin with the knowledge that “I am” and from that knowledge can I know that everything else must also exist? I think that the answer to that question is yes. Just from the knowledge that I exist, I can know that everything else must also exist.
Which brings me to Aquinas’ description of God, and that from God’s intellect necessarily follows God’s will, and from God’s will necessarily follows everything else. That seems eerily similar to the solipsistic argument that from the intellectual realization the I am, necessarily follows the existence of everything else.
Now some people believe that solipsism is simply nuts, but I think that it’s not really all that different from what Aquinas proposes, that from the intellect necessarily follows everything else.