In contrast to Zacharias' unbelief, he now presents Mary's faith and shows her to be a perfect model of the Church. She responds to the angel's pronouncement with child-like faith, with complete and total surrender and is a picture of humility. She is trusting that God the Father will form Christ in her. In the same way, His Church is to surrender and believe that He, by the power of the Holy Spirit, will produce the same miracle of forming the Christian life in us.