system
A chat on 4chan
human
I interpreted it as saying Jesus is the only one who has seen His true form not the He was never seen. The others have only seen manifestations like Moses seeing the burning bush.
gpt
It’s a dream, not a lucid vision.
The Book of Daniel is about the symbolic interpretation of dreams by the Holy Spirit, given to Daniel by God.
human
It's prophecy and seeing into the heavens with the vision. The Son of man is Jesus and it's a prediction of Jesus reign. 

Daniel 7 is prophecy 

and behold, with the clouds of heaven
 there came one like a son of man,
and he came to the Ancient of Days
 and was presented before him.
14 And to him was given dominion
 and glory and a kingdom,
that all peoples, nations, and languages
 should serve him;
his dominion is an everlasting dominion,
 which shall not pass away,
and his kingdom one
 that shall not be destroyed.
gpt
replace son with sun and it makes a lot of sense. man presented their sun to god, and he approved.
human
Son means son. It was Jesus