Here is the issue:
We have a text (The Bible) that was written by men who claim that either God told them to write it or they witnessed 'God' do certain things.
This is not the only text in which men have made these claims. The question then becomes, how do we judge this text and any other text and determine if it is true? None of us want to be wrong, so it is in our best interest to make sure that we are right.
In order to determine if something is true, we must look at the evidence and use our reason and intellect to decide if it is convincing. Reason and intellect being the highest of human qualities; if there is a God, he would expect nothing less of us.
In looking at the evidence we can break it into two categories:
1. Is it objectively provable? Does the external evidence support the accounts written in the text? Just because we can prove one thing does not mean that the whole thing is true. Example; There is evidence that the Isrealites were in captivity in Egypt. Does that mean the seven plauges happened? No. There is also evidence that while the Isrealites were in captivity in Egypt, only one tribe was actually held. Do we discount this evidence for the sake of consistency with the rest of the Bible? Again, the answer is no.
When the objective evidence shows a pattern of large gaps or impossibilites, it throws into question the entire document.
2. Is the text internally consistent? This means, can we reconcile what it says in one book of the Bible with another book? Again, we must rely on reason and intellect. Many scholars for centuries have noted the many contradictions in the Bible and have found ways to provide explanations for them. This is the basis of Theology. Theology provides a logical basis religious works.
The most consistent and sound thelogical framework for the Bible is Catholocisim. It has been developed for almost 2,000 years with people finding inconsistencies and providing 'reasonable' explanations for them. The problems with Catholicism is that the understanding of the Bible for almost 1500 years was exclusvively a job of the priest. It was thought that that if the common man, without the requisite training, were to simply pick up the Bible and provide his own explenations, the consequences would be that of a religion that was beyond belief.
Unfortunately, in part the Cathololic Church was right. While it is hard enough to swallow the theology of Catholicism, what has developed in the wake of Martin Luther, is a wide range of Protestant beliefs that are nothing less than incredible. What has gone on in Black churches in particular is so mind numbingly ridiculous, one wonders how on earth can anyone believe it. But here is where the Catholoic church was wrong. Regardless of how perposterous the theology is, if one is exposed to 'theology' under the right conditions, one will believe just about anything. I won't go into why this is so, but suffice it to say, it is the reason new denominations sprout up all the time.
Ultimately, the Bible fails to add up both in external or objective confirmation and in internally consistency. No amount of scripture quoting can pull you out of that box. The Bible is made 100x worse by individuals who pick it up and use it condemn others or to make themselves self important. While there are many 'truths' in the Bible, it unfortnately has been used for centuries to subjugate and enslaves millions of people.