“When Jesus had finished saying these things, the crowds were amazed at his teaching because he taught as on who had authority, and not as their teachers of the law” Matthew 7: 28 & 29
Jesus amazed everyone through his teachings. He did not entertain the crowd which gathered around him but taught regarding the Kingdom of God. It was not the humour but the authority which endeared his teachings to the masses.
There were several teachers during the time of Jesus. They also talked about the command God gave to Moses. But Bible says the crowd identified the difference between them and Jesus. Jesus spoke with authority. It was new for them.
Jesus was sent by God and his message was from God and about God. That gave him authority. This authority in turn gave credibility to him and his message.
Several people called Jesus ‘Teacher’ but few followed his teachings.
In Mark 10: 17 – 31 we see rich young man calling Jesus “Good teacher what must I do to inherit eternal life?” but failed to follow the instructions Jesus gave. He did not want to change his lifestyle. He wanted his riches.
But in John 3 Nicodemus who called Jesus ‘a teacher who has come from God’ (v.2) listened to him carefully and went back to his routine. Then after crucifixion, when even Jesus’ own disciples fled due to fear, he went with Joseph of Arimathea and asked Pilate for Jesus’ body.
Jesus, the master Teacher has taught many things during his earthly ministry. We have them written in the Bible for our instruction. To learn from it and gain benefit out of it or ignore it as unused manual is our choice.