Question about meaning and perception of reality from a theist.

[Perhaps]

This argument is like living in a bubble - you know a whole lot about the bubble and what's inside of it, and you may even be able to imagine what is outside of that bubble - but when it comes down to it, no body knows what is outside of it. 'Proofs' will always fail due to assumptions at their base - but at the same time, that doesn't mean they aren't 'really' true. How do you prove something exists? Not by assuming it, but you certainly can't say it doesn't exist - for that itself is an assumption. This is why most rational intellectuals who hold an atheist stance support that agnostic aspect as well - for they are humble enough to know that they cannot truly know.