John Wesley preaches on 'Scriptural Christianity,' emphasizing the essential nature of true Christianity as a transformative experience filled with the Holy Spirit. He discusses how this faith begins in individuals, spreads to others, and ultimately covers the earth, urging listeners to reflect on their own lives and communities. Wesley challenges the audience to consider whether they truly embody the fruits of the Spirit and live as examples of Christ's love and righteousness. He calls for a revival of genuine Christian values and practices, warning against complacency and urging a return to scriptural principles. The sermon serves as both a reflection and a call to action for the church and society at large.