Jesus is referred to most often in the New Testament with the terms Lord and Christ, followed by the Son of Man. That title comes from the Old Testament prophecy of Daniel. He wrote, "I was watching in the night visions, and behold, One like the Son of Man was coming with the clouds" (Daniel 7:13). Elsewhere in the Old Testament only God is mentioned coming with the clouds of heaven (Psalm 104:3; Isaiah 19:1). Son of Man refers to a divine-human ruler. That is the God-Man, the Lord Jesus Christ.
Jesus spoke of himself as the Son of Man in the New Testament more than any other title. He was referring to the title in Daniel's prophecy of a coming Messiah. In the Gospel of Matthew, Mark and Luke, Jesus refers to himself as the Son of Man sixty-nine times. In the Gospel of John, Jesus uses the same title for himself twelve times.
As the Son of Man, Jesus came to bring the kingdom of God. He taught about the kingdom of God and demonstrated it in signs and wonders. As the Son of Man, Jesus had authority on earth to forgive sins (Mark 2:10). He forgives every believer's sins. He died to pay the penalty for our sins. His resurrection proves it. That is the Gospel of the Son of Man.
Jesus will return as the Son of Man in clouds of glory to rule with dominion in the everlasting kingdom of God. "Then to him was given dominion and glory and a kingdom, that all people, nations, and languages should serve him. His dominion is an everlasting dominion, which shall not pass away, and his kingdom the one which shall not be destroyed" (Daniel 7:14).