I don't understand your comment about math, but it does sound deeply profound.
Regardless of whether or not God exists, the Universe we live in is the Universe we live in. And we don't like what the math tells us; people die. The stories we tell about possibilities of endlessness or eternity help some people feel better about the fact that they will eventually die.
As regards your first comment, assuming you have some concept of God then you must either believe he exists or not.
That's a bold statement. What concept of God must one believe or not?
The functional problem about your statemnt is that the requirement exists only in your postulation, much like the definitions of "God", "believe", and "exist".
Still, though, you might notice the hyperlink in what you quoted; it refers to another post, circa
August, 2016↗, from which that statement was extracted, and is derived from an odd discussion involving a comparison of some sort having to do with believing in "male".
It's easy enough to accept that people exist. Ironically, we Americans went through this weird chapter where it turns out a man named John Barron never actually existed.
Do I believe people exist? Yes.
Do I believe John Barron exists? Not that particular John Barron. While there are real people in the world named John Barron, the record persuasively suggests this particular person named John Barron did not actually exist.
Do I believe Yazata exists? How about Jan Ardena? Yes. Do I believe you are human beings? I mean, actually people? Yes. Indeed, anyone who proposes otherwise will be offering an extraordinary proposition: Nothing about the produce of either of your postings suggests you are bots. Is it possible that neither of you exist as individuals? It is possible that you are composite characters authored by multiple people for each name, but that would be an extraordinary assertion. It is easy enough to believe that Yazata exists. It is easy enough to believe that Jan Ardena exists.
Do I believe in God? It's a tricky question, but only because of market demands about the answer. I acknowledge the word "God" describes something that must be accounted for. The closest thing to divinity that would include is akin to an Unmoved Mover or Unnamed Namer, and in that context the actual name of God will be written as a mathematical formula. As it is, "God" is a three-letter, one-syllable word that, in its abstract monotheistic context represents a valid factor in philosophical calculation. Until we find a better word, certain statements like, "God works in mysterious ways", and, "We are fashioned in God's image", can actually be construed as true. (To the one, we are finite beings; to the other, chaos constrained reflects its constraints.) But that's it. Monotheism, to me, becomes inherently panentheistic; anything else limits God, thus making a the concept of boundlessness and oneness into a finite and severely delineated concept.
Do I believe in the monothestic godhead named Jehovah? No. Allah? No.
I am neither theist nor atheist nor agnostic; I am apathetic. I genuinely don't care whether or not God exists, because in the end it's all the same, anyway. The math is the math, and the reason we spend time developing intricate rituals and concomitant obligations―the creed, code, and cult of religion―is pretty much because we don't like what the math tells us.