T. Austin-Sparks emphasizes that the Church is fundamentally supernatural, originating from heaven and sustained by divine power. He explains that true Christianity, embodied in the Church, must be recognized as a spiritual entity that encounters opposition but ultimately prevails through supernatural support. The sermon outlines essential features of a true local church, including heavenly light, life, food, fellowship, and order, all of which reflect Christ's presence and purpose. Sparks warns against the dangers of relying on worldly methods, which can lead to a loss of spiritual power and impact. He calls for a return to the supernatural foundation of the Church to fulfill its divine mission.