Lots of people were using the argument that the Bible has been corrupted and isn't what was originally written, so they can dismiss it. Then the Dead Sea Scrolls were found, that were copied several hundred years before Christ, and it was almost identical to the other copies. When there was a difference, it was usually a minor misspelling or putting words in a different order. No differences changed the overall meaning of scripture. Also, there are more copies of the Bible than any other ancient book (2nd most copies are Homer's Iliad) and there are orders of magnitude more copies. Saying the Bible is corrupted and not valid invalidates every ancient manuscript. The argument of corruption is nonsensical.

God doesn't make mistakes. Every detail in the Bible is true. The Bible, although written down by many men through millennia, is one coherent document that explains all of history and the future. It should be central to all Christians. We can't just interpret it any way we feel like. Our understanding (especially about future events) may change as new nations come into existent and new technologies are created which couldn't be explained in the past, but the literal meaning doesn't change with a change in culture or a change in what we think science says. When science and the Bible disagree, it is the scientists that got a wrong.