The central message of this sermon is that faith is not about achieving a certain level of spiritual intensity or mustering up enough "real" faith to move mountains, but rather it is about simply believing in and trusting the authority of God. The centurion's faith, as exemplified in the story from Luke 7:1-10, is portrayed as simple, humble, and unassuming, yet remarkably effective. He understood authority from both above and below, recognizing that Jesus had spiritual authority that could bring healing and transformation to his servant's life. This understanding of faith as trust in God's authority has profound implications for the Christian life, suggesting that salvation is not about achieving a certain level of moral or spiritual purity, but rather it is about simply believing in and surrendering to the Lord Jesus Christ. The takeaway from this sermon is that faith is not something that must be struggled with or achieved through human effort, but rather it is a simple act of trust and obedience to God's authority, which can bring profound transformation and healing to one's life.