An old priest once said to me, "You know being a priest is great thing, it is better than being an ordinary Catholic because you don't have to listen to other peoples' boring sermons, just your own!"
The Gospel today says, "his teaching made a deep impression on them because, unlike the scribes, he taught them with authority."
There has always been a tendency to remove Jesus' authority, to make him just like any other boring preacher, indeed apart from things like the permanence of marriage, a great deal of what Jesus says is there in the prophets, in the Old Testament, it is not new.
What is amazing is not the message that is new but the messenger. Some people will follow Jesus' 'moral teaching' but forget who the teacher actually is.
The Church teaches, and has always taught, that Jesus Christ is the Son of God, God Incarnate, the Second Person of the Holy and Undivided Trinity. This is who wee receive in Holy Communion, this is the one to who we confess our sins, and the one who absolves us,
The unclean spirit knows who he is when it says, ‘What do you want with us, Jesus of Nazareth? Have you come to destroy us? I know who you are: the Holy One of God.’ He is not a Holy One but the Holy One.
The Gospels show us the disciples slowly coming to realise who Jesus is, at first he is a fascinating preacher, a worker of miracles, slowly they come to realise He is God. Peter, James and John glimpse it on the Mount of Transfiguration but for most it is something they come to only after the crucifixion and resurrection, for some only when they come to this realisation at the Ascension when they kneel or fall down before Him (even then, some hesitate).
Because it is not just we say but what we do, our kneeling during prayer, our genuflection before the Tabernacle, our bowing down during the creed at he words 'et incarnatus est' is an acknowledgement that Jesus is Our Lord and Our God.
With Jesus it is not his words so much as his actions which show he is God, and with the Church it is not so much her words but her actions which point to Him as God.
16 Meanwhile the eleven disciples set out for Galilee, to the mountain where Jesus had arranged to meet them. 17 When they saw him they fell down before him, though some hesitated. 18 Jesus came up and spoke to them. He said, ‘All authority in heaven and on earth has been given to me. 19 Go, therefore, make disciples of all nations; baptise them in the name of the Father and of the Son and of the Holy Spirit, 20 and teach them to observe all the commands I gave you. And look, I am with you always; yes, to the end of time.’