There is nothing more rational than looking in the mirror and deciding you and the mirror both appeared out of the ether (at least according to Stephen Hawking). Considering forum rules I'll refrain from entering a religious and philosophical debate here, but greater minds than ours have fallen on both sides of the fence when it comes to the existence of God.watch all the videos on the first page, read all 50 proofs on the RH side and discover rational thinking and reverse the ridiculous brainwashing you received as a child.
Whether you choose to believe in God or not is up to you. However, suggesting I'm irrational for believing in God tells me you've accepted one form of "brainwashing" for another. The question of God's existence is not so easily answered as that. Examine the evidence and make your own decision, but please don't classify my belief as stupid because I don't think what you think.