That title song is a quiet masterpiece. Sure, it's a little corny in the arrangement, but the message is universal. It never fails, at least in my case, to elicit tears -- of recognition.
This cast is a hymn to life-long marriage. (That's just what it is.) It is also my attempt to say better what I almost always tried to convey to engaged couples in pre-marital counselling, especially at the start of the second session of the three we would have. I would highlight the importance of a shared spiritual life.
I realize that could sound a little preachy, and one tended to soften it some over the years, especially when the couples who would come were less "churched" and more secular in experience. But that doesn't mean I stopped believing it. ("Don't Stop Believin' -- but hey!...)
What you observe empirically, both in others and typically in yourselves, is that the closer you feel to God, as a married couple, the closer you feel to each other. Moreover, a shared vertical commitment offers decisive help to your relationship when the storms start coming and the losses begin to add up.
Bottom Line: Praise the One who brought you together in the first place, and please don't lose touch with him. (If you do, go to a conference at Tullian's church in Jupiter -- he's got the Answer to lostness.) Read the Bible together, and, well, you'll be looking in the same direction. LUV U (both).