9 “Turn not Thou away Your Face from me.” You turned it away from me when proud. For once I was full, and in my fullness I was puffed up. Once “in my fullness I said, I shall never be moved.” “I said in my fullness, I shall not be moved,” knowing not Your Righteousness, and establishing my own; but “You, Lord, in Your Will hast afforded strength to my beauty.” “I said in my fullness, I shall not be moved,” but from You came whatever fullness I had. And to prove to me that it was from You, “You turned away Your Face from me, and I was troubled.” After this trouble, where into I was cast, because You turned away Your Face, after the weariness of my spirit, after my heart was troubled within me, because You turned away Your Face, then became I “like a land without water to You: turn not Thou away Your Face.”
You turned it away from me when proud; give it back to me now I am humble. Because, if Thou turn it away, “I shall be like to them that go down into the pit.” What is, “that go down into the pit”? When the sinner has come into the depth of sins, he will show contempt. They “go down into the pit,” who lose even confession; against which is said, “Let not the pit close her mouth over me.” This depth Scripture calls mostly “a pit,” into which depth when a sinner has come, “he shows contempt.” What is, “he shows contempt”? He no longer believes in Providence, or if he do believe, he thinks that he has no longer anything to do with it....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)