I'm not sure it's possible to PROVE the existence of Heaven (and Hell, for that matter), particularly w/o the use of the Bible. I personally believe in both Heaven and Hell; but one of the large components of Christianity is an individual's FAITH in the words provided in the Bible. While many events and people's lives (including Jesus') can be proven, other things, such as Heaven, miracles (which many non-Christians believe to be scientific coincidences, or whatever) require a Christian's confidence that what he/she reads in the Bible is fully true and accurate. Try as we might, NO religion can be scientifically proven to be true (w/o the use of that religion's holy book & other similar sources); indeed, it's quite difficult to prove something exists that cannot be seen at all.
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