Your question is beautiful in its simplicity and in its profoundness. Let's change your question, for a moment, to "What, if anything, in the Bible can we believe as true?" Well, if we are to decide which passages in the Bible are true we must first have some sort of benchmark by which we can measure them.

We should not accept or deny any passage simply because it seems to us to be too incredulous or too desirable. (i.e. deny the 7 day creation or accept Jesus resurrection) That is not a benchmark. That is simply an emotion. We need a good source of credibility. So consider this: Is God, Himself, a good source of credibility? If God stood before you and gave you an answer would you believe it? My answer to that is "Yes."

Countless times in the Old Testament specific people relay to us what God has told them. But I assume that, for many readers today, these individuals lack credibility because there are no corroborating witnesses to verify that God actually said these things to them. So maybe we cannot trust the Old Testament to be true. Please read on.

The New Testament features God speaking to people in a very different form than in the Old Testament ... PERSONALLY, FACE TO FACE, as the man Jesus. God took the form of a human being to address man in a very direct manner. Why should we believe that this happened?

Because it was reported, not by one individual, as in the Old Testament, but by many, we can give the existence of Jesus credibility. The gospels of John, Mark, Mathew and Luke are independent verifications of Jesus' time on this Earth; as well as are the 13 books written by Paul. But why should we believe these guys? We should believe them because of how much they suffered for sticking to their stories.

You see, the Apostles all followed Jesus with fervor while things were going well. But, when Jesus was arrested, they all fled in fear of persecution. They abandoned Him. Even refusing to know Him when confronted. Not one of them attended His crucifixion or even his funeral. But 40 days later they were ALL back out in the public preaching His message. For the rest of their lives they continued preaching, against the threat of death by the Roman government. Each one of these men underwent excruciating torture and death rather than retract their testimony that Jesus rose from the dead or rather than stop preaching his message. To me, that is proof that Jesus did, in fact, raise from death and appear, as indicated, to over 500 people. If Jesus can do that He should be given some credibility in what He says. And, here is the kicker ... HE SAID THAT HE IS GOD.

So we have multiple credible eye witnesses, that all died rather than retract their statements, verifying that He raised from the dead. We have Him establishing to us that He is God. So I think we can believe anything He says. And most of what He says is verified by multiple reports from multiple men. But what about everything else in the Bible?

Well, let's look at the rest of the New Testament. Jesus told the 11 apostles (Judas was no longer with them) that He would put the Holy Spirit in them to guide them in their teachings. For me, that verifies the rest of the New Testament. What about the Old Testament?

Multiple times Jesus referred to Old Testament passages, verifying their truthfulness. I believe that this means all of the Old Testament is true.

So that is the LOGIC that I use to support my belief that every word in the original Bible manuscripts is true and infallible. But consider in the book of John, chapter 20 verse 29, when Jesus, after raising from the dead, stood before His apostle Thomas. Thomas couldn't believe that it was Him until Thomas put his finger into Jesus' wounds. Consider what Jesus then said to Thomas: "Is it because you have seen me that you have believed? How blessed are those who have never seen me and yet have believed!"

So I caution you to rely too heavily on logic and proof. Just search the word "faith" in an online Bible and see how much Jesus emphasizes the importance of faith over proof.

God Bless You.