13 “That my glory should sing unto You, and I should not be pricked”. That now, not my humiliation, but my glory should not lament, but should sing unto You, for that now out of humiliation You have exalted me; and that I should not be pricked with the consciousness of sin, with the fear of death, with the fear of judgment. “O Lord, my God, I will confess unto You for ever.” And this is my glory, O Lord, my God, that I should confess unto You for ever, that I have nothing of myself, but that all my good is of You, who art “God, All in all.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)