The central message of this sermon is that ordinary people, like John the Baptist, can be used by God for extraordinary purposes when they are willing to point others to Christ and acknowledge their own limitations as humans. The sermon emphasizes that John's significance was not due to his personal greatness or abilities, but because he had a job to do - pointing others to Jesus. This is a powerful reminder that God's work often involves ordinary people with ordinary faith accomplishing extraordinary things when they are willing to surrender themselves to His purposes. The sermon advances the belief that God can use anyone for great things if they are willing to listen and obey, regardless of their background or circumstances. The takeaway is that our job as followers of Christ is not to focus on ourselves, but to point others to Him, trusting in His power and presence to accomplish His work through us.