In Mark 2, Jesus is saying that you wouldn't use an old piece of cloth to patch a garment or put new wine into old wineskins. Similarly, we can't just patch God onto our lives. We can't combine our way of life and God's way – we have to be totally transformed. We cannot receive the gospel of grace and remain the way that we are! We need a whole new wineskin, we need to be reborn, and we need to be “refilled” with the Spirit of God.