There are quite credible alternative explanations for the Universe, and one could argue an ineffable, supernatural being is no explanation at all. After all, *why* did God create the universe?
Paul who? The Apostle Paul? He didn't write Hebrews! Your inference is not reasonable since it wasn't inferred. "Evidence of things not seen" is not the same as "evidence of things not detected." "Elegchos" is literally "proof" and "ou blepomenon" means "things not being seen with the eyes" like wind and gravity.
There are quite credible alternative explanations for the Universe,
Credible to whom? To those who demand an alternative to God? Isn't that like the Dems offering a feeble and token tax cut as an alternative to Bush's tax cut? It certainly is an alternative, but it is credible only to the Dem faithful.
After all, *why* did God create the universe?
Every catechism has that question and answer in it. A more interesting question might be *why* did the universe create itself?