But that's bound to strawman "naturalism," probably by associating it with scientism so that science alone grounds anything's naturalness. Alas, philosophy and art work with science, and they can broaden our sense of reason to address such foundational, metaphysical issues. There's no need for religious revelation, which is bogus anyway.

I write about Hart's view of atheism elsewhere:

https://medium.com/gods-funeral/do-modern-liberals-owe-everything-to-christianity-40af4edd2fb0?sk=8d2ac3b07e53bfd180eaaec79b4e2d63