14 Therefore understand it not so....When you are filled with spiritual riches, can you be poor? And was he therefore rich, because he had a bed of ivory; and are you poor who hast the chamber of your heart filled with such jewelry of virtues, justice, truth, charity, faith, endurance? Unfold your riches, if you have them, and compare them with the riches of the rich. But such an one has found in the market mules of great value, and has bought them. If you could find faith to be sold, how much would you give for that, which God wills that you should have gratis, and you are ungrateful? Those rich then lack, they lack, and what is heavier, they lack bread....For He has said, “I am the Living Bread which came down from Heaven.” And again, “Blessed are they which do hunger and thirst after righteousness: for they shall be filled.” “But they that seek the Lord shall not want any good thing:” but what manner of good, I have already said.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)