The idea that "being in love" is the only reason for remaining married really leaves no room for marriage as a contract or promise at all. If love is the whole thing, then the promise can add nothing; and if it adds nothing, then it should not be made.
~ C.S. Lewis ... Mere Christianity
Of course there is more to this. His thought is not completed in just that brief passage - but it's something to think about until I add the rest of the story.