If I make the claim that my wife is prominent in my earthly affections, that’s not saying very much. All I would be saying is that within my heart’s desires, she is noticeable and easy to see among all of the other competing passions in my life. In my earthly affections, my wife should reign as preeminent, surpassing all others and without peer or rival. As Christ should be preeminent over all in my heart! Jesus comes to us passionately and jealously because His Father’s Preeminence consumed Him (Cf. Psalm 69:9, 119:139; John 2:17) Christ was so zealous that His Father would have First Place in our hearts that during at least one scene He became an Army of One driving the idolaters from His Father’s house. He was so jealous for the honor of His Heavenly Father and His Temple that it ate Him up. Paul reminds us of the Majestic Supremacy of Christ who is entitled to have First Place in our hearts,
And he is before all things, and in him all things hold together. And he is the head of the body, the church. He is the beginning, the firstborn from the dead, that in everything he might be preeminent. For in him all the fullness of God was pleased to dwell, and through him to reconcile to himself all things, whether on earth or in heaven, making peace by the blood of his cross. (Colossians 1:17-20)
So just as a newly married bride is given a new name and an accompanying identity, the new identity is the only incentive she needs to live a life which her affections are set exclusively on her husband. Before she may have felt some affection for others but now her husband is the preeminent affection of her heart so that anything which would distort or destroy that affection must be insistently refused. So with us who are united to Christ.