The sermon centers on the transformative call to become a man God would choose to use, grounded in the biblical example of David and the life of D.L. Moody, both of whom exemplified a heart fully surrendered to God. It emphasizes that divine usefulness is not rooted in outward appearance, talent, or achievement, but in inward qualities such as courage, integrity, and a deep, passionate relationship with God marked by praise, prayer, and repentance. Drawing from Scripture, particularly 1 Samuel and the Psalms, the message highlights that God looks on the heart, values humility and faithfulness over stature or status, and delights in those who pursue Him with authenticity and dependence. The sermon challenges listeners to cultivate a life of daily surrender, intentional prayer, and genuine worship, recognizing that true spiritual power comes not from self-effort but from being filled with the Holy Spirit and living in continual communion with God.