Every relational dynamic has obstacles: forgiveness to offer, apathy to overcome, acceptance for people in process, and conflict to resolve. The covenant relationship of husband and wife seems to have a 10x multiplier effect.
The new humanity Jesus establishes in our relating to one another is grounded in what God established in a garden wedding. Each of us is an image-bearer of God. We reflect the glory of God on the whole AND each of us do this in part – no one of us represents all of the glory all the time.
Paul speaks about the distinctives of 1c family life in the Roman/Greco world. These principles of the new humanity are timeless: mutual submission, an other-centered love, and moving forward together knowing it will cost you something personally.