What is the meaning of Matthew 22:33?

And when the multitude heard [this], they were astonished at his doctrine. (Matthew 22:33 KJV)

And when the multitudes heard it, they were astonished at his teaching. (Matthew 22:33 ASV)

And when the crowds heard [it] they were astonished at his doctrine. (Matthew 22:33 DBY)

When the multitudes heard it, they were astonished at his teaching. (Matthew 22:33 WEB)

And having heard, the multitudes were astonished at his teaching; (Matthew 22:33 YLT)

Interlinear

And <kai> when the multitude <ochlos> heard <akouo> this, they were astonished <ekplesso> at <epi> his <autos> doctrine. <didache> (Matthew 22:33 KJV)

Spurgeon’s Commentary on Matthew

Verse 33

Our Lord’s reply to the Sadducees was so complete that they were “put to silence”  (Mt 22:1; 28:20). They did not attempt any further assault upon him, for they must have been convinced of their own impotence. Those who had stood by as listeners, the multitude, that had gathered as crowds delight to do when there is a public discussion, were astonished at his doctrine. They were “astonished” both at the matter and the manner of Christ’s teaching. This is an expression that we often find in the life of our Lord; but apparently those who were “astonished” did not accept his teaching. They talked to one another about the marvelous way in which he answered all questions; but they did not admit that such a Teacher could be none other than the long looked-for Messiah. Even the scribes, who complimented Christ upon his answer (Lu 20:39), saying, “Master, thou hast well said,” did not follow up that confession by becoming his disciples.