Marriage was designed from the beginning to display the new covenant between Christ and the church. We have seen this in Ephesians 5:31-32. The very essence of this new covenant is that Christ passes over the sins of his bride. His bride is free from shame not because she is perfect, but because she has no fear that her lover will condemn her or shame her because of her sin.
This is why the doctrine of justification by grace through faith is at the very heart of what makes marriage work the way God designed it. Justification creates peace with God vertically, in spite of our sin. And when experienced horizontally, it creates shame-free peace between an imperfect man and an imperfect woman.
