Is Christianity Really a Story of Reality?

Questions about whether Christianity is about following Jesus rather than a story of reality, what John the Baptist meant when he said, “He must increase, but I must decrease,” and why John the Baptist seemed confused about whether or not Jesus was the Messiah after he had already confessed he was.

• You said Christianity is a story of reality, and I agree that the Bible is a story of reality (it helps lead our lives), but isn’t Christianity about following Jesus?
• What did John the Baptist mean when he said, “He must increase, but I must decrease,” and how does that apply to us?
• In John 1:34, John the Baptist acknowledges that Jesus is the Son of God after baptizing him, so why does he seem confused in Luke 7:19 and Matthew 11:3?