“Seek first his kingdom and his righteousness, and all these things will be yours as well” (Matt. 6:33). Therefore: “Do not be anxious about tomorrow, for tomorrow will be anxious for itself. Let the day’s own troubles be sufficient for the day.” These are the words of the Lord that should illuminate the Christian vision. These words, however, are not a maxim of piety. They are, rather, an ethical imperative for Christians and a law of human reality. When, instead, we look for mere economic good above all else, not only do we not obtain it, but often we can also lose the kingdom of God. The reflections that I will propose in this article will attempt to bring out that fact. They will seek, that is to say, to demonstrate that the Gospel and the social doctrine of the Roman Catholic Church, expressed so well by Saint Thomas Aquinas and by successive popes, contain those essential principles of human life and the achievement of its good, which no economy, if it wants to be a good economy, can forget.