Major Ian Thomas emphasizes that Jesus Christ is the image of the invisible God, highlighting that His life was a derived life, fully dependent on the Father. He explains that true righteousness comes from allowing Christ to live through us, making us vessels of His divine action. Thomas stresses that being a Christian is not merely about conversion but about living in a way that reflects Christ's life and character in our daily actions. He encourages believers to recognize their need for the Holy Spirit to enable them to embody the righteousness of Christ, thus fulfilling their purpose as created in God's image.