Matthew 22:45

"If David then call Him Lord, how is He then his Son," not taking away the fact that He is his Son, away with the thought; for He would not then have reproved Peter for this, but to correct their secret thoughts. So that when He saith, "How is He his Son?" He meaneth this, not so as ye say. For they said, that He is Son only, and not also Lord. And this after the testimony, and then submissively, "If David then call Him Lord, how is He his Son?" But, nevertheless, even when they had heard these things, they answered nothing, for neither did they wish to learn any of the things that were needful. Wherefore He Himself addeth and saith, that "He is his Lord." Or rather not even this very thing doth He say without support, but having taken the prophet with Him, because of His being exceedingly distrusted by them, and evil reported of amongst them.

(ap. Anselm.) He concludes from this authority, If David then call Him Lord, how is He his son?

Then since He had answered, He asks also in turn, "What think ye of Christ, whose Son is He? They say unto Him, The Son of David." See after how many miracles, after how many signs, after how many questions, after how great a display of His unanimity with the Father, as well in words, as in deeds; after having praised this man that said, that there is one God, He asks the question, that they may not be able to say, that He did miracles indeed, yet was an adversary to the law, and a foe to God. Therefore, after so many things, He asks these questions, secretly leading them on to confess Him also to be God. And the disciples He asked first what the others say, and then themselves; but these not so; for surely they would have said a deceiver, and a wicked one, as speaking all things without fear. So for this cause He inquires for the opinion of these men themselves. For since He was now about to go on to His passion, He sets forth the prophecy that plainly proclaims Him to be Lord; and not as having come to do this without occasion, nor as having made this His aim, but from a reasonable cause. For having asked them first, since they answered not the truth concerning Him (for they said He was a mere man), to overthrow their mistaken opinion, He thus introduces David proclaiming His Godhead. For they indeed supposed that He was a mere man, wherefore also they said, "the Son of David;" but He to correct this brings in the prophet witnessing to His being Lord, and the genuineness of His Sonship, and His equality in honor with His Father. And not even at this doth He stop, but in order to move them to fear, He adds what followeth also, saying, "Till I make Thine enemies Thy footstool;" that at least in this way He might gain them over. And that they may not say, that it was in flattery he so called Him, and that this was a human judgment, see what He saith, "How then doth David in spirit call Him Lord?" See how submissively He introduces the sentence and judgment concerning Himself. First, He had said, "What think ye? Whose Son is He?" so by a question to bring them to an answer. Then since they said, "the Son of David," He said not, "And yet David saith these things," but again in this order of a question, "How then doth David in spirit call Him Lord?" in order that the sayings might not give offense to them. And He Himself too in like manner for this cause introduces the doctrine in the way of question and inference, saying, "How then doth David in spirit call Him Lord, saying, The Lord said unto my Lord, Sit Thou on my right hand, until I make Thy foes Thy footstool;" and again, "If David then call Him Lord, how is He then his Son," not taking away the fact that He is his Son, away with the thought; for He would not then have reproved Peter for this, but to correct their secret thoughts. So that when He saith, "How is He his Son?" He meaneth this, not so as ye say. For they said, that He is Son only, and not also Lord. And this after the testimony, and then submissively, "If David then call Him Lord, how is He his Son?" But, nevertheless, even when they had heard these things, they answered nothing, for neither did they wish to learn any of the things that were needful. Wherefore He Himself addeth and saith, that "He is his Lord." Or rather not even this very thing doth He say without support, but having taken the prophet with Him, because of His being exceedingly distrusted by them, and evil reported of amongst them. To which fact we ought to have especial regard, and if anything be said by Him that is lowly and submissive, not to be offended, for the cause is this, with many other things also, that He talks with them in condescension. Wherefore now also He delivers His doctrine in the manner of question and answer; but He darkly intimates even in this way His dignity. For it was not as much to be called Lord of the Jews, as of David. But mark thou also, I pray thee, how seasonable it is. For when He had said, "There is one Lord,"

This question is still available for us against the Jews; for these who believe that Christ is yet to come, assert that He is a mere man, though a holy one, of the race of David. Let us then thus taught by the Lord ask them, If He be mere man, and only the Son of David, how does David call Him his Lord? To evade the truth of this question, the Jews invent many frivolous answers. They allege Abraham's steward, he whose son was Eliezer of Damascus, and say that this Psalm was composed in his person, when after the overthrow of the five kings, the Lord God said to his lord Abraham, Sit thou on my right hand, till I make thine enemies thy footstool. Let us ask how Abraham could say the things that follow, and compel them to tell us how Abraham was born before Lucifer, and how he was a Priest after the order of Melchisedech, for whom Melchisedech brought bread and wine, and of whom he received tithes of the spoil?