They went to Capernaum; and when the sabbath came, he entered the synagogue and taught. They were astounded at his teaching, for he taught them as one having authority, and not as the scribes. (Mark 1: 21-22)

Jesus taught with authority, the Greek is exousia or the power to choose. Real authority is derived from deep and true understanding.

The scribes could recount and explain what had been handed down. But Jesus was able to reveal the scripture's current relevance and meaning.

The goal of teaching is - or should be - the empowerment of learners. This authority comes from a deep understanding of how principles are put into practice.

Above is an element of the Exodus Suite by Marc Chagall showing Moses with the tablets of the law.