Falling out of Repentance

Gary Thomas says in, Sacred Marriage:

Couples don't fall out of love so much as they fall out of repentance. Sin, wrong attitudes, and personal failures that are not dealt with slowly erode the relationship, assaulting and eventually erasing the once lofty promises made in the throes of an earlier (and less polluted) passion.

A few sentences later he says:

Use the revelation of your sin as a means to grow in the foundational Christan virtue of humility, leading you to a confession and renouncement. Then go the next step and adopt the positive virtue that corresponds to the sin you are renouncing. If you've used women in the past, practice serving your wife. If you've been quick to ridicule your husband, practice giving him encouragement and praise.

(From page 101)