12 “I will offer to You the sacrifice of praise”. For I have not found any deserts of mine, since You have broken my bonds asunder; I therefore owe You the sacrifice of praise; because, although I will boast that I am Your servant, and the son of Your handmaid, I will glory not in myself, but in You, my Lord, who hast broken asunder my bonds, that when I return from my desertion, I may again be bound unto You.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)