But atheism has one fatal flaw. It assumes that the sum total of reality is what can be detected by the senses.
It's not a flaw, it's just the way things are. We define everything which exists against the benchmark of what can be comprehended by the senses. Such things exist, everything else doesn't. This isn't a problem if Genesis is understood correctly but becomes a stumbling block when it is misconceived by both Christians and atheists.
We have to concede that even by biblical standards, God doesn't "exist". Why? because we know this from Genesis. God created everything but he didn't create himself. He was also not created by anyone else. God, therefore, remains uncreated, unmade, not part of his creation.
I don't mean that there is no God - that is a very different proposition.
So think it through. Everything we can comprehend with our senses is the creation, including ourselves. By default, it's not God, unless we wish to reduce the divine to an instance of existence, which is a kind of idolatry and very unsound. Cars, trees, people, whatever are all instances of "existents". God doesn't fall into this category.
“For in him we live and move and have our being.” is a bit more comprehensive. I would say that rather than being an existent, God sustains existence itself, without which there could be nothing - well at least not sentient life.