“However, after his brothers had left for the festival, he went also, not publicly, but in secret. Now at the festival the Jewish leaders were watching for Jesus and asking, “Where is he?” Not until halfway through the festival did Jesus go up to the temple courts and begin to teach. The Jews there were amazed and asked, “How did this man get such learning without having been taught?” Jesus answered, “My teaching is not my own. It comes from the one who sent me. Anyone who chooses to do the will of God will find out whether my teaching comes from God or whether I speak on my own. Whoever speaks on their own does so to gain personal glory, but he who seeks the glory of the one who sent him is a man of truth; there is nothing false about him. Has not Moses given you the law? Yet not one of you keeps the law. Why are you trying to kill me?”
John 7:10‭-‬11‭, 14‭-‬19

So Jesus’ brother leave for the festival or “Feast of Tabernacles” or (boothes), and not too soon afterward, so does He. He went quietly, knowing that the religous leaders were still watching for Him, in hopes of either killing Him or publically discrediting Him because they were still mad about Him healing the man on the sabbath.

So halfway through the 7 day festival, Jesus begins to teach. Even the religous leaders are amazed saying, ““How did this man get such learning without having been taught?” From their perscpective, He was basically uneducated. All Jewish boys went to temple school were they memorized the Torah (Genesis thru Dueteronomy). Only the very brightest, with aspirations of themselves becoming a religous leaders progressed passed basically age 12–the majority began to learn their father’s trade and entered the workforce. Jesus, a carpenter and the son of a carpenter , had obviously not made this cut or He wouldn’t have a trade. So how had He learned to teach with such authority? The answer–He, Himself authored the Book–of course He was an Authority on it!

Jesus, Himself answered their question! In a nutshell He says, “My teaching is not my own–its what My Father says. Anyone who teaches his own thing is seeking his own glory. I teach what My Father teaches because I seek HIS glory. The Man Who seeks the glory of the One Who sent Him is telling the truth!” Jesus is reinterating what He told them before: “the Father and I are One”! (John 5:17-23) Jesus continued this line of teaching throughout the book of John (10:30) and He wasn’t saying that He and the Father shared the same thoughts or values or beliefs. He wasn’t refering to Him and God having the same mission. He was saying “We (the Father and I) ARE ONE IN THE SAME”. This was what made the religous leaders so mad–He was identifying Himself as God because that’s Who He was! This is what made Him the Messiah–God with Us! (IMatt 1:23 referencing Is 7:14)

Jesus concludes what He says to the religous leaders with a question of His own, “Has not Moses given you the law? Yet not one of you keeps the law. Why are you trying to kill me?”
They were trying to kill Him because He was obviously not part of their religous system, challenging and actually threatening it and their prestigious standing within it.

Jesus taught with authority because He was the Authority. He, as man, was God in man. He was fully God and represented God and He was fully man, identifying with us as humans!

Think about it!