David Wilkerson emphasizes that God brings people into His house and saves them through the lives of His faithful servants. He illustrates that the light of Christ shines through those who live righteously and selflessly, serving as examples of God's mercy in their communities. Wilkerson shares a testimony of two women from his church whose Christ-like behavior at work caught the attention of their CEO, demonstrating that true light comes from living out the life of Christ. He stresses that it is essential for believers to embody the message they preach, as their actions can lead others to seek the source of their light. Ultimately, the sermon calls for Christians to remember that even small acts of kindness can reflect God's love and draw others to Him.