Sometimes, Christians become confident of their own ability to reason and they lose touch with Christ. Since reasoning without Divine revelation from Jesus Christ must be based on assumptions, nothing can be known by reasoning without Divine revelation from Jesus Christ. That’s the problem with a lot of theology–it’s rationalized rather than revealed. God speaks through the Bible, but God says, through the Bible, that He speaks through other means as well. In fact, the reason that we know that the Bible is the Word of God without error is because this fact is revealed to us by the Spirit of Christ.