For years there's been research on what makes for healthy first marriages. Now we know what makes for a lasting blended family marriage. Compared to happy stepfamily couples, those who are unhappy are 3 times more controlling, 6 times more critical, and 9 times more stubborn. Contrast that to happy couples who demonstrate the fruit of the Spirit outlined in Galatians 5. They are more patient, kind, and gentle. So, letting God's Spirit live through you is the first step to a marriage that lasts.