William MacDonald emphasizes that the Church is not merely an organization but a living organism, a body of believers united in Christ through the Holy Spirit. He defines the Church using various metaphors such as a flock, God's husbandry, and the body of Christ, illustrating its vital role in worship and community. MacDonald also discusses the mission of the Church, highlighting the importance of preaching the gospel and grounding believers in the truths of the Church. He argues that the Church began on the day of Pentecost, marking a significant moment in God's plan for humanity. Ultimately, he calls for Christians to devote themselves to the Church's expansion and spiritual welfare.

A.W. Tozer emphasizes the monumental task of the Church in spreading the gospel of Christ, which is the power of God for salvation. He reflects on the Church's reliance on the Holy Spirit, who empowered it at Pentecost, enabling it to achieve remarkable moral victories in a short time. Without this divine empowerment, Tozer argues, the Church would have failed like many sects before it. He calls for the same power today, recognizing that without the Holy Spirit, the Church remains incapable of fulfilling its mission. The sermon concludes with a prayer for empowerment to continue the work of spreading the gospel.