Then will appear the sign of the Son of man in heaven, and then all the tribes of the earth will mourn, and they will see the Son of man coming on the clouds of heaven with power and great glory.
(Jesus (as) is speaking about son of man ! if anyone reads those parts of Gospels carefully he will confess that Jesus (as) is speaking about someone else ! it is vivid !!even some Christians scholar believe that son of man is about someone who will accompany Jesus. moreover they prefer to call Jesus (as) as son of God not son of Man !)