philosophical naturalism helds, that the natural world is all there exists. .
It often seems to me that a vast and common difference between people who embrace the idea of a supernatural God and people who don’t is that religious people want to believe that they have a complete understanding of existence and construct a “theory” of explanation, (i.e. the Bible, Torah, Bhagavad Gita), and atheists don’t.
There are a multitude of questions which have not yet been answered, or more correctly, phenomena that are not deeply understood. The fact that a person who holds to philosophical naturalism admits that there are such phenomena does not somehow prove the existence of the supernatural. “We don’t know” may not be a satisfying answer, but it is an honest one.