Jesus knocks at the front door of our heart (Rev. 3:20). In response we do not immediately open the door via our free will. Instead, we quickly put locks on the door and push furniture against it. The Lord then sends the Holy Spirit to slip in the back door. He goes down into the basement, where He turns up the heat and sets fires until the rising heat forces us to remove the barriers and open the front door and let Christ in. I believe that the Lord keeps right on using this backdoor approach in our growth in grace.
He sets fires in our basements by putting us in limiting and painful circumstances.--The Heart of a Servant Leader: Letters from Jack Miller (P&R, 2004), 90