This is really a weak argument.. you can actually see oxygen with the proper equipment..
And also the one where instead of oxygen its the brain.. you can actuallu touch your brain..heard of brain surgery? Sometimes, they keep you awake during that, so when they go poking at your brain (your brain has no nerves on it, so you cant feel anything touching it), they can see what each area does, because every brain is different.
If there were a better argument for the existance of God as being real, I’ll post it.. regardless of being atheist or christian, its hard to hold up the argument of God (being real) without there being a good comeback.
And..erm..yes..I did color that picture lol..my sister wanted it rainbow..but it turned out red instead..