Here is a quote from Tim Keller
“The key to a marriage is simply reenacting the gospel to each other. You can talk about communication skills or other stuff, and they’re all good, but basically knowing how to forgive and knowing how to repent…If you both can forgive and repent, it doesn’t matter how different you are, you’ll be okay. Two Christians who are married, no matter how incompatible…if you can repent and forgive.” (“Marriage Advice from Tim Keller“)
The other thing I want to state is that the Gospel also allows you to see sin not just at the behavioral level but the deeper problem at the idolatry level thereby allowing the possibility of making a significant, common step toward Christian growth for 2 people in a marriage. The Gospel and a deep understanding of the cross make a difference in a marriage.
The Gospel of Jesus Christ is…
We are more sinful and weak than we ever dared to admit and…
We are more loved and accepted than we ever dared to hope
We will never hunger for Christs’ beauty until we have seen the filth of our own vain efforts to make ourselves beautiful.