22 “Be pleased, O Lord, to deliver me”. As if he were saying, “'If You will, You can make me clean.' Be pleased to deliver me. O Lord, look upon me to help me.” Look, that is, on the penitent members, members that lie in pain, members that are writhing under the instruments of the surgeon; but still in hope.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)