Jesus’ “Sermon on the Mount” in Matthew chapters five, six and seven is wholly original. Nothing like it had ever been preached before. While Pharisees and scribes almost always cited Old Testament references for their lesson points, Jesus used the Old Testament in a different way.
Six times in Matthew chapter five the phrases, “it was said,” and “but, I say to you,” were given by the Lord. Jesus was showing the truth of the Bible’s teachings in contrast to the narrow, limited and often mistaken applications of Jewish leaders.
After the lesson, the people were shocked and astounded by what they heard (Matthew 7:28). The Greek grammarian A.T. Robertson wrote, “They listened spell-bound to the end and were left amazed. Note the imperfect tense, a buzz of astonishment.”
Jesus didn’t need to cite authority during his lessons. The Creator, himself, spoke from his own authority. This is why the people hearing him were amazed. What the people saw and heard was the “one and only full of grace and truth” (John 1:14 NET).
It has often been said that people didn’t know who Jesus was and never suspected he was the son of God. Such an idea is completely untrue. Jesus showed himself to be the genuine son of God. The fact was unmistakable.
Such undeniable truth makes it all the more astonishing that when Jesus revealed himself to the Jews all they wanted to do was kill him (Mark 14:1). Even today there are those who oppose Jesus and do everything they can to discredit and deny his deity.
The term, “the real McCoy” is an English idiom thought to have been started in Scotland. The use of the phrase means to describe something as the “real thing,” or the “genuine article.”
Jesus is the real thing. Jesus is the genuine article. May each of us understand this truth, obey his gospel and live our lives in sacrifice to him!
 “Word Pictures in the New Testament, by A.T. Robertson Volume I, Page 63. Broadman Press