The irony here is that the Sadducees didn’t even believe in a resurrection, but they decide to try to use the idea of the resurrection to trap Jesus. They come up with an absurd question involving a woman and seven brothers based on Deuteronomy 25:5-6. Jesus says that their premise is faulty because marriage relationships are different in the resurrection, and then He goes on to blow their minds. He quotes from Exodus 3:6 to show that there must be a resurrection, and they decide that they shouldn’t ask Him any more questions!
The Pharisees aren’t deterred though. Even though the Sadducees have been silenced, they decided to test Jesus. One of their experts in the law asks Jesus what the greatest commandment in the law is. He responds that Deuteronomy 6:5 is the greatest commandment, and then goes on to say that Leviticus 19:18 is like it. The reason that these are the greatest is that all other laws are applications of these two laws of love.
Jesus decides to take matters into His own hands. He has a question based on Psalm 110 (which is the Old Testament chapter the New Testament quotes the most). He ask them if they really believe that the Messiah is the son of David, and when they respond in the affirmative He asks how it’s possible that David could then call him Lord? Jesus shows them that their understanding is flawed regarding both the Messiah (who was in existence before David), and the nature of God (there is a plurality in the Godhead). It is enough: no one dares question Him any longer!
Jesus also says that when David wrote Psalm 110 that he was led by the Spirit. That reminds us of the fundamental nature of God’s Word. It is inspired by God. It is given by the Spirit. That’s why we can trust it!
2 Timothy 3:16-17 “Every scripture is inspired by God and useful for teaching, for reproof, for correction, and for training in righteousness, that the person dedicated to God may be capable and equipped for every good work.”
2 Peter 1:20-21 “Above all, you do well if you recognize this: No prophecy of scripture ever comes about by the prophet’s own imagination,for no prophecy was ever borne of human impulse; rather, men carried along by the Holy Spirit spoke from God.”
For worship: https://www.youtube.com/watch?v=z-dtRO66cDA