What a fascinating philosophical thread I missed five years ago. I think all things are based on belief except two that don’t. One is mathematics, which interestingly doesn’t exist in what we call reality. What I mean by that, is that perceived reality conforms to mathematical rules true, but nothing that exists is mathematics. The other is our own reality, not the body though, but that thing that is aware of the body and much else as well. Maths of course doesn’t exist as I said but matter and forces work according to its rules, but what exactly are they confirming to? Even mathematics poses a kind of belief or acceptance that it works without knowing why, leaving only the inner thing of the subjective self as existing with no need for proof. Who ever needed to prove their own existence to themselves? It is simply irrelevant and in fact when one thinks about it, one doesn’t even need evidence let alone proof that one own self is real, why is that? but perhaps it provides some clues as to why belief is needed, as when one belief is removed anther takes its place. It is like all have the same amount of belief but its arranged differently for each person, yet consistency still seems to be present in the universe due to mathematical laws.
Sorry just thinking outloud.