IMO, quantum physics renders Aquinas' third proof largely specious. General relativity does not really explain away the first proof. I can potentially be sold on a purposefully engineered universe, aka the fifth proof.
- The Theist Perspective -
Thomas Aquinas' Five Proofs of God
Thomas’s first proof is based on the concept of a prime mover, now understood as the result of an inference to the best explanation for celestial dynamics.
The second proof is from the nature of the effcient cause. From the fact that we can now see directly the effects of causal chains originating in times remote from human experience, we are called upon to make plausible inferences as to how the first effcient cause, got the game started, and this, says Thomas, is that “which all call God.”
The third proof is taken from the natures of the merely possible and necessary. Given that “nothing can come from nothing” and that there are many things, there must have been something that was the source of the first thing.
The fourth proof arises from degrees—of goodness, truth, nobility, and the like—that are found in things. There exists therefore something that is the truest, best, and noblest—the greatest being.
Thomas gives as the fifth proof the natural order itself: “There is something intelligent by which all natural things are arranged in accordance with a plan—and this we call God.”
- The Atheist Perspective -
Sigmund Freud regarded God as an illusion, based on the infantile need for a powerful father figure; religion, necessary to help us restrain violent impulses earlier in the development of civilization, can now be set aside in favor of reason and science.
Steven Hawking: "I think the universe was spontaneously created out of nothing, according to the laws of science. If you accept, as I do, that the laws of nature are fixed, then it doesn't take long to ask: What role is there for God?"