17 “Why have You rejected me?” “Rejected” me, that is to say, from that height of the apprehension of the unchangeable Truth. “Why have You rejected me?” Why, when already longing for those things, have I been cast down to these, by the weight and burden of my iniquity? This same voice in another passage said, “I said in my trance” (i.e., in my rapture, when he had seen some great thing or other), “I said in my trance, I am cast out of the sight of Your eyes.” For he compared these things in which he found himself, to those toward which he had been raised; and saw himself cast out far “from the sight of God's eyes,” as he speaks even here, “Why have You rejected me? Why go I mourning, while mine enemy troubles me, while he breaks my bones?” Even he, my tempter, the devil; while offenses are everywhere on the increase, because of the abundance of which “the love of many is waxing cold.” When we see the strong members of the Church generally giving way to the causes of offense, does not Christ's body say, “The enemy breaks my bones”? For it is the strong members that are “the bones;” and sometimes even those that are strong sink under their temptations. For whosoever of the body of Christ considers this, does he not exclaim, with the voice of Christ's Body, “Why have You rejected me? Why go I mourning, while mine enemy troubles me, while he breaks my bones?”
You may see not my flesh merely, but even my “bones.” To see those who were thought to have some stability, giving way under temptations, so that the rest of the weak brethren despair when they see those who are strong succumbing; how great, my brethren, are the dangers!
Source: The Enarrations, or Expositions, on the Psalms (New Advent)