Paul's teaching in 1 Corinthians 7 is one of the most honest things in the New Testament about marriage difficulty. He acknowledges that marriage involves "trouble in the flesh" — the Greek is thlipsis, the same word translated "tribulation" elsewhere. He is not surprised that marriage is hard. He expected it to be. What he doesn't do is use that difficulty as a reason to abandon it. He also speaks practically to situations where separation has already happened (v.10–11) and to marriages where one spouse may not share the other's faith (v.12–14). This is pastoral theology for real situations, not idealized ones.
Hosea is the most demanding marriage book in the Old Testament, and it almost never appears in marriage sermons. God commands the prophet to marry a woman named Gomer who will be unfaithful to him — not as a punishment, but as a picture. And when she leaves and ends up sold, God commands him again: go buy her back. "So I bought her to me for fifteen pieces of silver, and for an homer of barley, and an half homer of barley." That is not a romantic story. It is a picture of covenant faithfulness that costs everything, pursued not because the other person earned it but because the covenant itself is the point.
Ephesians 5 is usually read through the lens of roles, but it is first a passage about sacrifice. Paul sets the standard for a husband as Christ's self-giving for the church — which included washing, forming, patient endurance over time. The wife's response of willing trust assumes a husband doing something trustworthy. These two things are supposed to reinforce each other, not operate independently or be deployed as arguments in a conflict.
Ecclesiastes 9:9 is a verse that rarely makes it into marriage devotionals: "Live joyfully with the wife whom thou lovest all the days of the life of thy vanity." Qohelet — who sees the world with clear eyes, stripped of illusion — still lands here. In a life full of hebel, breath, uncertainty, you have this: the person beside you, the ordinary days, the ordinary joy available in them. That is not a small thing.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.