{Because he is the Son of man} (hoti huios anthr(9370)ou
estin). Rather, "because he is a son of man" (note absence of
articles and so not as the Messiah), because the judge of men
must partake of human nature himself (Westcott). Bernard insists
that John is here giving his own reflections rather than the
words of Jesus and uses huios anthr(9370)ou in the same sense as
ho huios tou anthr(9370)ou (always in the Gospels used by Jesus of
himself). But that in my opinion is a wrong view since we have
here ostensibly certainly the words of Jesus himself. So in  Re
1:13  4:14  huion anthr(9370)ou means "a son of man."