Matt Brown emphasizes the principle of reaping what we sow, urging attendees to invest their lives into the gospel. He shares personal experiences and stories of God's movement, encouraging everyone to be inspired and to take action in their communities. Brown highlights the importance of focusing on the goodness of the gospel rather than the negatives of culture, advocating for a life filled with love, joy, and the fruits of the Spirit. He calls for a new wave of evangelism, where believers are moved to share the stories of God's work in the world. The sermon concludes with a prayer for openness to God's movement and a commitment to live as carriers of the gospel.