I can only prove or
know my own 'being-ness', and
that is all. All 'else' is a projection, conception, perspective or assumption from some point in space or time, reflecting other points out there

- so
its all 'relative', unless I consider the pure absolute knowledge of being
itself, which is ever Self-evident, as long as I AM. 'God' is the only and ever-reality, omnipresently existing.
Heaven, if cognizing my own God-presence, is
ever present. There is nowhere I could go, apart from it (whether there is a conscious or unconscious state assumed). - this puts the whole 'heaven' or 'hell' thing in a different light, more a play of the 'ego' or religious myth-making,...but that's another chapter