6 “For the voice of my groaning, the bones cleave unto my flesh”. For many groan, and I also groan; even for this I groan, because they groan for a wrong cause. That man has lost a piece of money, he groans: he has lost faith, he groans not: I weigh the money and the faith, and I find more cause for groaning for him who groans not as he ought, or does not groan at all. He commits fraud, and rejoices. With what gain, with what loss? He has gained money, he has lost righteousness. For the latter reason, he who knows how to groan, groans; he who is near the head, who righteously clings to Christ's body, groans for this reason. But the carnal do not groan for this reason, and they cause themselves to be groaned for, because they do not groan for this reason; nor can we despise them, whether they groan not at all, or groan for the wrong cause. For we wish to correct them, we wish to amend them, we wish to reform them, and when we cannot, we groan; and when we groan, we are not separated from them....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)