Starting with the bible would actually be a good way to go about it, but then you have to test that original assumption to destruction to see what survives scrutiny. If all you're doing is testing the bible against itself, in order to prove the validity of the bible, well obviously you're going to go round in circles. You're no better off than a Star Wars fan using quotes from the fanfiction to explain what the Kessel Run means.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
