T. Austin-Sparks emphasizes the critical importance of maintaining a heavenly vision for the Church, contrasting the heavenliness of Christ with the earthbound nature of Jerusalem and Judaism. He illustrates how Jerusalem's decline was linked to its earthly focus, leading to spiritual blindness and rejection of Christ, who embodied everything heavenly. The sermon warns against the dangers of jealousy, prejudice, and division within the Church, which reflect a departure from its true heavenly nature. Sparks calls for spiritual oneness among believers, asserting that true unity is essential for the Church to fulfill its divine purpose and resist worldly influences. He concludes by highlighting the necessity of the Holy Spirit's dominion in the Church to maintain its heavenly identity and mission.