Charles Spurgeon Commentary Mark 1:21-22

"And they go into Capernaum; and straightway on the sabbath day he entered into the synagogue and taught. And they were astonished at his teaching: For he taught them as having authority, and not as the scribes." — Mark 1:21-22 (ASV)

He did not do as the scribes did, who made a great parade of learning by quoting this Rabbi and the other, but Jesus said, "Verily, verily, I say unto you." He spoke as one who felt that he had authority to speak in his own name, and in the name of God his Father. This method of teaching quite astonished the Jews. I wish that those who now hear the gospel might be astonished at it, and be astonished into believing it by the power with which it comes home to their consciences and hearts.