This is a wonderful and revealing statement about the foundation of this marriage. There is a sense in which the Christian's whole life is in the Husband, and yet the Christian has not become completely lost. He is still here, as Paul says, The life I now live, I live in the flesh.
Though there is a great mystery concerning the marriage relationship, and we must never forget that this great name of Jesus Christ is upon us. What matters, and should matter to all of us, is that our names have been changed. Here in the realm of the church, other names do not matter. What matters now is that the name of Christ is on us.
So we are united here, and we are all together in Him. He has taken us to Himself, His church, His bride. Notice again what Christ says to the Philadelphians and to the rest of the church.