God shows himself ever rich in mercy, ever ready to treat his people with deep tenderness and compassion, especially at those tragic moments when infidelity ruptures the bond of the covenant, which then needs to be ratified more firmly in justice and truth. Here is a true love story, in which God plays the role of the betrayed father and husband, while Israel plays the unfaithful child and bride. These domestic images – as in the case of Hosea (cf. Hos 1-2) – show to what extent God wishes to bind himself to his people.
This love story culminates in the incarnation of God’s Son. In Christ, the Father pours forth his boundless mercy even to making him “mercy incarnate”. As a man, Jesus of Nazareth is a true son of Israel; he embodies that perfect hearing required of every Jew by the Shema, which today too is the heart of God’s covenant with Israel: “Hear, O Israel: The Lord our God is one Lord; and you shall love the Lord your God with all your heart, and with all your soul, and with all your might” (Dt 6:4-5). As the Son of God, he is the Bridegroom who does everything to win over the love of his bride, to whom he is bound by an unconditional love which becomes visible in the eternal wedding feast.
From the Lenten Message for 2016 by Pope Francis