“and that’s really the purpose to have the Bible written so that we can understand and how one is to be saved, and so that mankind can be reconciled to Himself.”
That is a misuse of the written word. The early Christian had no New Testament, they were saved by the Holy Spirit that was spread amongst the world after Jesus defeated death...and themselves testifying to the new grace that was dispensed for all, who are willing. That is why you are misusing the bible.
The early Christians had the apostles themselves who testified to Christ, so they didn’t need the written word like we do (and that is WHY God had them write down their testimony of Him) and they did have the Old Testament prophets which as in Luke 16:31 “And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, though one rose from the dead.”
Which (the O.T. also testified about Christ, I would recommend especially reading Isaiah)..
It’s not a very logical argument you make.