I’ve been mulling over this concept recently.
If you ask almost any modern Christian, the first thing they will say is critical to a marriage is good communication. They won’t say the God or things like Bible’s marital roles and responsibilities.
If the husband and wife were able to keep putting God first, especially the Biblical marital roles and responsibilities and the fruit of the Spirit, how would that look?
There’s a reason why the Biblical marital roles and responsibilities are the way they are. They are to keep us united in oneness, even though we are prone to walking with the flesh rather than the Spirit. If the husband and wife are each doing their God-given roles and responsibilities (husband headship, love, honor and wife respect, submission, affection, etc. and freely giving themselves sexually to one another and growing in the fruits of the Spirit), you’re going to have not only a godly marriage but likely a successful and happy one too.
God knows what He is doing, yet we always try to convince ourselves we know better than God and want to do it our own way.
If you’re doing your God-given roles and responsibilities, most of the work is already done. You only need “good communication” if you want to keep arguing or being contentious with your spouse that God’s way isn’t the best way.
(Now, I’m not discounting the fact that it’s a good idea to communicate back and forth about various topics, but this can easily be warped into selfish principles of “what’s in it for me” rather than God’s).