it's absolutely irrational to try to prove the existence of somethin that, by definition, is unmaterial.
no real christian would deny that. by the way, if you could prove the existence of god, automatically you would have to discard it as a god, since it would be material (that is, mutable) finit, non-all-knowing, etc., all the qualities a god is supposed to have.
I believe in god, but have given up trying to demonstrate that he can/n't exist, I just believe, that gives me peace. hope you feel the same by not believing.
love is the answer, that's what jesus (and other prophets or mesiahs)said