God makes of the two spouses one single life. The Bible uses a powerful expression and says “one flesh”, so intimate is the union between man and woman in marriage. And this is precisely the mystery of marriage: the love of God which is reflected in the couple that decides to live together. Therefore a man leaves his home, the home of his parents, and goes to live with his wife and unites himself so strongly to her that the two become — the Bible says — one flesh. (…)When the husband prays for his wife and the wife prays for her husband, that bond becomes strong; one praying for the other. (…) And many times the husband and wife become a little fractious and argue between themselves. (…) Yet we must not become saddened by this, this is the human condition. The secret is that love is stronger than the moment when there is arguing, and therefore I always advise spouses: do not let a day when you have argued end without making peace. Always! (Pope Francis, General Audience, 2 April 2014)