How do we know the authority of Christ's preaching?

The authority of Christ's preaching is established by His identity as the Son of God who speaks the words of God. Unlike the scribes and Pharisees who taught from a distance, Christ preached directly with power and clarity. He demonstrates His authority not merely through teaching but through His actions and miracles, which authenticate His message. Matthew 7:28-29 states that the people were astonished at His doctrine for He taught as one having authority, emphasizing the unique position He held as the ultimate prophet who fulfills the Law and the prophets.