Psalms 55:10

14. “Turned be mine enemies backward” ( ver. 9 ). This thing to these very men is profitable, no ill to these men he is wishing. For to go before they are willing, therefore to be amended they are not willing. Thou warnest thine enemy to live well, that he amend himself: he scorneth, he rejecteth thy word: “Behold him that adviseth me; behold him from whom I am to hear the commandments whereby I shall live!” To go before thee he willeth, and in going before is not amended. He mindeth not that thy words are not thine, he mindeth not that thy life to God thou tellest out, not to thyself. In going before therefore he is not amended: it is a good thing for him that he be turned backward, and follow him whom to go before he willed. The Lord to His disciples was speaking of His Passion that was to be. …

15. “In whatsoever day I shall have called upon Thee, behold I have known that my God art Thou” ( ver. 9 ). A great knowledge. He saith not, “I have known that God Thou art:” but, “that my God art Thou.” For thine He is, when thee He succoureth: thine He is, when thou to Him art not an alien. Whence is said, “Blessed the people of whom is the Lord the God of the same.” Wherefore “of whom is”? For of whom is He not? Of all things indeed God He is: but of those men the God peculiarly He is said to be, that love Him, that hold Him, that possess Him, that worship Him, as though belonging to His own House: the great family of Him are they, redeemed by the great blood of the Only Son. How great a thing hath God given to us, that His own we should be, and He should be ours! But in truth foreigners afar have been put from holy men, sons alien they are. …