This section starts with Paul reminding us we are dearly loved children, which then should encourage us to imitate our Father and live a life of love. God the Son, Jesus Christ, also loved us so much that He was willing to give Himself up by dying on the cross for us as a sacrifice and offering unto God. That love compels us to move out of darkness into the light of the Lord. Christians are to "live as children of light" (vs. 8). Since we live in days that are evil, believers need to watch how they live, and be thankful. Music is a big part of our worship to God as well as our way of encouraging each other to walk in faith. We are to "submit to one another out of reverence for Christ." This leads to the example of marriage which reflects to the world what our relationship with Christ looks like. He is the head, we are the body. The husband is the head in the marriage, and the wife is to place herself under the authority of her husband. He is to love her. She is to respect him. Paul quoted Genesis 2:24, which Jesus quoted in Matthew 19:4-5, "For this reason, a man will leave his father and mother and be joined to his wife and the two will become one flesh." This is the mystery which Paul spoke of earlier in this letter. The husband and wife become one, like Christ and His church become one. This is the mystery of how old humanity, with faith in Jesus Christ and who He is, and what He did on the cross, has now made a new humanity that is now one with Christ. As Paul said in verse 32, "This is a profound mystery!"