why should I trust this book more than any other
what proof is there that this god exists
I would love to answer these questions for you myself, but unfortunately I don't have the time to explain them right now. I'll have to get back to this later.
In the meantime however, there is a biblical, Christian site that worded it way better than I possibly could; so I will provide links to their answers to these questions below:
http://www.gotquestions.org/Bible-God-Word.htmlhttp://www.gotquestions.org/proof-of-God.html(it would be easier for everyone perhaps if I simply copy-pasted the articles into here, but the problem there is that the articles are simply way too big and would be a monstrous post stretch)
yes the bible is filled with good morals but that's really as far is it goes
If the Bible was simply a book with "good morals" and that's as far as it goes, then how can the countless parts of this book that declare God's existence and directly refer to Him be explained? They would be lies in that case, which would contradict the Bible as simply a "moral book".
Where do these "good morals" that we are looking for come from anyway? It can't come from the reasoning of humans, because morals/ethics would easily differ among each individual; ergo, the morals of every single person could not all be actually true at once because there will always be people whose moral beliefs contradict. Relativistic thinking takes over and as such shows human-made "morals" aren't really morals, ethics, truths, or whatever you want to call them at all. The only place true morality and ethics could come from then is an absolute and single authority; that being God.
Therefore, if there was no God, there would be no authority or basis for which to establish right from wrong in the first place. So the argument that God can't exist because a good God wouldn't allow evil is self-contradictory.
Another common saying among many nonbelievers is "Jesus was a great moral teacher, but I don't believe he was the son of god". It is impossible to reasonably accept Jesus as simply a "great moral teacher" but reject him as God's son. He declared to be God Himself; If He was a moral teacher but not actually God, this would make Him a liar, and therefore not an acceptable teacher of morals at all. So you're left with the options of either accepting Him as the son of God or rejecting Him as a crazy man.
if people are doing that they aren't agnostic
Excellent point, thank you, I had forgotten that.