Christ is the central figure and the central focus of the Scriptures from Genesis to Revelation. He ought also to be the central figure and the central focus of our lives. To live otherwise and to call oneself a Christian is to be a living contradiction.
John the Baptist said it well, (John 3:30) "He must increase but I must decrease."
He must become increasingly more central in every area of my life, but I must become increasingly more peripheral in every area of my life.
Christ-Centeredness in life causes us to behold the glory of Christ, and in so doing to be changed into His likeness in ever-increasing degrees of glory. (2 Corinthians 3:18)
Christ-Centeredness in marriage enables husbands to love their wives as Christ has loved the church, and enables wives to submit to their husbands as unto the Lord. (Ephesians 5:22-26)
Christ-Centeredness in relationships enables us to love each other as Christ has loved us. (John 13:34)
Christ-Centeredness in the workplace enables us to do everything in the name of the Lord. (Colossians 3:17)
Christ-Centeredness in joy enables us to be completely filled with the very joy of Christ Himself, and in so doing to become increasingly freed from the poisonous pleasures of this world. (John 15:11)
Christ-Centeredness = Unbreakable Joy (Psalm 73:25, 27:4, 1 Peter 1:8-9)