Brief Answer:

If you think we have a different message in the Bible today than the original writings, like maybe some overly zealous church leaders or copyists made changes in the Bible to incorporate their ideas, and making the Bible become different from the original writing, then: #1 What evidence do you have to support your belief against all the evidence making the scholars think the Bible hasn’t changed. #2 Have you really thought about what would have to have happened?

Detailed Answer:

I often have to encourage people to be more skeptical of their skepticism, and study or think further. For people to have changed the Bible, there would have to be multiple levels of phenomenally doubtful conspiracy. Pastor Voddie Baucham sarcastically explained this in a talk. 

What we know of Julius Caesar’s conquests in the Gallic Wars comes from an original writing we do not have, but have 10 manuscript copies. Herodotus is considered a great historian by what we learn from his writing, which is preserved by less than 10 manuscript copies (although maybe more copies have been found by now). Now if someone wanted to change the accounts from Herodotus or about Caesar, they had a thousand or more years to change those 10 copies, and they would have to change all, or almost all of the copies to trick us into thinking we know what was originally written as the copies all match. 

Level 1 of the Conspiracy

Yet, the New Testament has around 6000 copies in just Greek, meaning conspiracists would have to get their hands on all, or almost all the copies, make the same change without leaving obvious writing or paper blemishes showing changes were made, and put all copies back where they found them without the current owners being aware. And without very committed biblical writers, and later a chain of custody of their committed students or disciples, raising objections from their own direct experience and copies. This is just level 1 of this vast conspiracy you would have to believe occurred. 

Level 2 of the Conspiracy

Level 2 would involve a lot of travel and linguistics. When Jesus told the disciples to go and make disciples in all nations, this involved making copies in other languages, like Syriac, Coptic, Latin. So now it is not just the 6000 Greek manuscripts needing to be found and altered, but all those copies in all those other languages and locations, making sure the lies told in Greek match the lies told in those other languages. And all this must be unnoticed because the scholars have detected nothing of this supposed grand conspiracy. 

 Level 3 of the Conspiracy

And, of course, the early church fathers would constantly cite the Bible in their sermons and letters, which in turn were passed out to other churches. A foremost biblical scholar, Bible translator, textual critic and longtime professor at Princeton Theological Seminary, Bruce M. Metzger, observed if we had lost every manuscript copy of the New Testament, then we could still reproduce 95% of the New Testament with just the writings of the early church fathers. 

Thus, level 3 requires the conspirators to find all the writings of the early church fathers, change to match the lies of the other two levels, without notice. Voddie correctly concluded with lament for those who believe in such a conspiracy by adding:

“Help you if you believe that.”