The sermon interprets Revelation 20 through an amillennial lens, arguing that the binding of Satan occurred at Christ's first coming rather than a future literal millennium. It explains that this spiritual restraint prevents Satan from deceiving the nations, thereby enabling the global spread of the gospel during the church age. The preacher emphasizes that while Satan remains active in opposition, his power to stop the salvation of God's elect is nullified by Christ's authority. This theological perspective serves to encourage bold evangelism and missionary work, assuring believers that the mission cannot fail because Jesus is currently reigning from heaven. Ultimately, the message calls for confidence in the gospel's success and urgency in sharing it with all peoples.