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Before I graduated high school, I read the Christian Bible six times, front to back, because I couldn't hear sermons, so I read the Bible instead. Most Christians never read it once.
I also read it without the "aid" of those daily scripture readers that basically feed scripture to you piecemeal and tell you what it means, instead of having you read it in context and figure it out for yourself.
After high school, I became a "born again Christian". I studied the Bible intensely and I used a concordance to study the original words behind the translations. You learn a lot of interesting stuff doing this.
I also compared different translations of the Bible. After a while, you notice that some translations will translate passages in ways that change the meaning in crucial ways. If it all means the same thing, why the difference in meaning?
Some translations had extra passages that weren't present in other translations. Some even had extra books! Where did this come from? Why didn't other translations have them?
Using the concordance, I learned that the original words behind the translation could be translated in a variety of ways. Just like many words in English can have many meanings depending on grammar or cultural context, so did the original Hebrew, Aramic and Greek. There is so much that we no longer know about these original cultures that oftentimes, it is virtually impossible to know what exact context or meaning the author meant. Thus a perfect translation becomes impossible.
I found some passages that were obviously translated with extreme bias. By that I mean, that some passages were severely contorted to force the passage to fit the translator's doctrinal bias. I could not understand how in the world the translator translated THAT out of the original phrase.
There are also a lot of contradictions in the Bible. There are two creation stories in Genesis that do not sequentially match, for example.
The Bible can also be used to promote the most fearsome vision of eternal torment in Hell... or be used to promote the idea that everything and everyone will one day be reconciled to God, with no one and nothing left in Hell, that even Hell would cease to exist (this is called Universal Reconciliation). Passages in the Bible can be found to support both positions.
Finally, we're talking about a circular argument.
1. How do we know God exists?
2. Because the Bible says so.
3. Why should we believe the Bible?
4. Because God inspired or wrote it.
5. How do we know God exists?
6. Because the Bible says so...
And so on and on. We get nowhere with this. There is no hope of independent verification.
People are entitled to their belief. But religious belief and reason do not begin with the same foundation and thus tend to talk past the other.
I'm not a Christian anymore, obviously.