Demonstration of God's Existence III: an Augustinian Proof Greenwell's articulation on Augustine's "Proof" has much in common with Feser's "Argument from Mathematical and Logical Truths". Greenwell puts it:
"Our experience therefore indicates that these shared truths point to a truth external from us that is immutable and, what is more eternal. These shared truths do not change and will never change, and so behind these shared truths there appears to be a truth which is immutable and eternal and to which we ought to conform. This truth is God, or if there is something even higher than this truth, then this something higher is God. In either event, God exists."
But he does not go into the key move from the eternal truths to God. In a way (notice my hesitation, here) he seems to be arguing
1. Mathematical Truths exist as eternal and unchanging.
2. God is eternal and unchanging.
3. Therefore, God exists.
(Yes, I know, this is not right, but it is the impression I get reading his article.)
Greenwell asserts that "There is an inextricable link between truth, our faculty to recognize it, our search for truth, and God. This is St. Augustine's argument." But he does not provide a description/discussion of how one moves from the existence of eternal truths to the existence of God. He simply asserts it.
So, why does Augustine think that the existence of eternal truths entails the existence of God?