David Wilkerson emphasizes that if Christ is the supreme authority over His kingdom, then our lives must be governed by Him in every aspect. He explains that to be governed by Jesus means allowing Him to control our thoughts, words, and actions, as He rules not only our hearts but also the nations. Despite the moral decay and challenges in society, Wilkerson reassures that God remains in control, and His kingdom is established within us. He encourages believers to increase their submission to Christ's rule and highlights the importance of the Word of God as the means by which Jesus governs us. Ultimately, the sermon calls for a deeper commitment to living under the authority of Christ and His teachings.