What does the Bible say about the authority of Jesus' teachings?

In the Sermon on the Mount, Jesus astonished the crowd with his authoritative teaching, which stood in stark contrast to the customary methods of the scribes who relied on past Jewish teachers. He consistently used the phrase 'I say unto you’ to denote His direct authority. The people recognized that He spoke not from human tradition but as the very Son of God, effectively affirming His divine right to interpret and fulfill the Scriptures. His teachings were fresh, powerful, and rooted in God's Word, demonstrating His unique understanding and authority as the true interpreter of the Law and the Prophets.