The sermon explores the nature of God's calling to ministry by examining the life of young Samuel in 1 Samuel 3. It identifies five key characteristics of those whom God calls: being busy with God, inexperienced yet equipped, teachable, available, and obedient. The message encourages believers to prioritize their relationship with God over mere religious activity and to surrender fully to His direction regardless of their background or comfort level. Emphasizing that God uses ordinary people for extraordinary purposes, the preacher challenges the congregation to respond to divine invitations with humility and readiness. Ultimately, the sermon serves as both an encouragement for those specifically called and a general invitation for all listeners to examine their own responsiveness to God's voice.