Jesus now asks the Pharisees a question concerning who they thought the Christ was. They understood the Scriptures which showed He must be descended from David but they could not respond to Christ when He demonstrated from Scripture that the Christ must be greater than David - God Himself come in flesh.
We are faced with the same question in this sermon. There are many today, some even calling themselves Christians, who will not acknowledge that Jesus is God as well as man. Yet as we see, only a Christ who has both a human and a divine nature could possibly save fallen sinners from the condemnation they so justly deserve.