Marriage is also the experience of belonging completely to another person. Spouses accept the challenge and aspiration of supporting one another, growing old together, and in this way reflecting God’s own faithfulness. This firm decision, which shapes a style of life, is an “interior requirement of the covenant of conjugal love”,380 since “a person who cannot choose to love for ever can hardly love for even a single day”.381 At the same time, such fidelity would be spiritually meaningless were it simply a matter of following a law with obedient resignation. Rather, it is a matter of the heart, into which God alone sees (cf. Mt 5:28). Every morning, on rising, we reaffirm before God our decision to be faithful, come what may in the course of the day. And all of us, before going to sleep, hope to wake up and continue this adventure, trusting in the Lord’s help. In this way, each spouse is for the other a sign and instrument of the closeness of the Lord, who never abandons us: “Lo, I am with you always, to the close of the age” (Mt 28:20).
There comes a point where a couple’s love attains the height of its freedom and becomes the basis of a healthy autonomy. This happens when each spouse realizes that the other is not his or her own, but has a much more important master, the one Lord. No one but God can presume to take over the deepest and most personal core of the loved one; he alone can be the ultimate centre of their life. At the same time, the principle of spiritual realism requires that one spouse not presume that the other can completely satisfy his or her needs. The spiritual journey of each – as Dietrich Bonhoeffer nicely put it – needs to help them to a certain “disillusionment” with regard to the other,382 to stop expecting from that person something which is proper to the love of God alone. This demands an interior divestment. The space which each of the spouses makes exclusively for their personal relationship with God not only helps heal the hurts of life in common, but also enables the spouses to find in the love of God the deepest source of meaning in their own lives. Each day we have to invoke the help of the Holy Spirit to make this interior freedom possible.