T. Austin-Sparks emphasizes that the Church is not a physical building or organization, but rather the living union of believers with Christ. He explains that God intentionally chooses the weak and foolish to demonstrate His power, transcending human limitations and abilities. This union with the risen Christ allows believers to access divine resources and capabilities that surpass worldly standards. Sparks warns against complacency in weakness, urging believers to actively engage in God's work through their union with Christ. Ultimately, the Church is a manifestation of Christ's power in and through His people.