Luke 20:42

The Pharisees did not answer Christ's question. They did this in spitefulness, or rather against their own selves, for perhaps being convicted by the inquiry the word of salvation would have shined in them. They did not wish to know the truth, but sinfully seizing for themselves the Lord's inheritance, they denied the heir, or rather wickedly murdered him. They rejected the faith because of their love of leadership, greed for profit, and for their shameful gains.…To remove from them the habit of thinking and speaking of him in a derogatory and scornful manner, he asked them, "How do they say that Christ is David's Son, etc.?" As I have already remarked, they were silent from malicious motives and thereby condemned themselves as unworthy of eternal life and of the knowledge of the truth.

He manifests then that He is not opposed to the Father, but agrees with Him, since the Father resists the Son's enemies, Until I make thine enemies thy footstool.

Second, as to the eternal generation foretold by the Prophet, he adds: And David himself says in the book of Psalms: The Lord said to my Lord: Sit at my right hand. Without doubt David says this word for word in the Psalm, which treats …

He said to them: How do they say that Christ is the son of David, and David himself says in the book of Psalms: The Lord said to my Lord: Sit at my right hand, until I make your enemies your footstool? David therefore calls …

And since they had been defeated in argument, they ask Him no further questions, but seize Him, and deliver Him up to the Roman power. From which we may learn, that the poison of envy may indeed be subdued, but it is a hard thing to keep it at rest.

And David himself saith in the book Psalms,....

If he be his Lord, why do we call him his Son? This he left them to consider of, but they could not reconcile this seeming contradiction; thanks be to God, we can; that Christ, as God, was David's Lord, but Christ, as man, was David's Son. He was both the root and the offspring of David, Rev. xxii.

Let us observe in this passage — what striking testimony to Christ's divinity, the book of Psalms contains. We read that after patiently replying to the attacks of His enemies, our Lord in turn propounds a question to them. He asks them to explain an expression in the hundred and tenth Psalm, where David speaks of the Messiah as his Lord. To this question the Scribes could find no answer.

Let us observe in this passage — what striking testimony to Christ's divinity, the book of Psalms contains. We read that after patiently replying to the attacks of His enemies, our Lord in turn propounds a question to them. He asks them to explain an expression in the hundred and tenth Psalm, where David speaks of the Messiah as his Lord. To this question the Scribes could find no answer. They did not see the mighty truth — that Messiah was to be God as well as man; and that while as man , He was to be David's son — as God , He was to be David's Lord. Their ignorance of Scripture was thus exposed before all the people. Professing themselves to be instructors of others and possessors of the key of knowledge — they were proved unable to explain what their own Scriptures contained. We may well believe that of all the defeats which our Lord's malicious enemies met with — none galled them more than this. Nothing so abashes the pride of man — as to be publicly proved ignorant of that which he imagines is his own particular department of knowledge. We have probably little idea how much deep truth is contained in the book of Psalms. No part of the Bible perhaps is better known in the letter — and none so little understood in the spirit . We err greatly, if we suppose that it is nothing but a record of David's feelings, of David's experience, David's praises, and David's prayers. The hand that held the pen was generally David's — but the subject matter was often something far deeper and higher than the history of the son of Jesse. The book of Psalms, in a word, is a book full of Christ — Christ suffering — Christ in humiliation — Christ dying — Christ rising again — Christ coming the second time — Christ reigning over all. Both of Christ's advents are here: the advent in suffering to bear the cross — and the advent in power to wear the crown.