Marriage on the Rock is based on Psalm 127 verse one which says, "Unless the Lord builds the house, its builders labor in vain." It is a daily devotional providing guidance for most marital circumstances. The book is based on Biblical principles; ones that should serve Christians well. However, if the principles are true, which I believe they are, people need not be practicing Christians to improve their marriage. Even the strongest marriages can benefit from periodic reminders of how they can demonstrate their love and respect for one another. As a counselor I saw far too many couples who had been married for ten to forty years; they had amassed such bitterness and unforgiveness that they could not move past the hurt and pain that they had inflicted on one another. By the time couples came to see me they were usually certain their spouse was the primary cause. They had little hope that things would change. Some had even tried counseling at some point but failed to apply what they learned. Each person needs to accept their contribution to the state of their marriage. Each needs to be willing to change whether or not their spouse is willing, for we can only change ourselves. In most cases the culprit is self-centeredness. When we learn to die to self, amazing things can happen.