Sing to the Lord a new song; his praise is in the assembly of the saints. We are urged to sing a new song to the Lord, as new men who have learned a new song. A song is a thing of joy; more profoundly, it is a thing of love. Anyone, therefore, who has learned to love the new life has learned to sing a new song, and the new song reminds us of our new life. The new man, the new song, the new covenant, all belong to the one kingdom of God, and so the new man will sing a new song and will belong to the new covenant. There is not one who does not love something, but the question is, what to love. The psalms do not tell us not to love, but to choose the object of our love. But how can we choose unless we are first chosen? We cannot love unless someone has loved us first. Listen to the apostle John: We love him, because he first loved us. The source of man’s love for God can only be found in the fact that God loved him first. He has given us himself as the object of our love, and he has also given us its source. What this source is you may learn more clearly from the apostle Paul who tells us: The love of God has been poured into our hearts. This love is not something we generate ourselves; it comes to us through the Holy Spirit who has been given to us.
From a sermon by Saint Augustine, bishop