Who is the Son of Man? (Jn 12:34-12:34)

“The crowd answered him.

‘We have heard

From the law

That the Christ,

The Messiah,

Remains forever.

How can you say

That the Son of Man

Must be lifted up?

Who is this Son of man?’”

ἀπεκρίθη οὖν αὐτῷ ὁ ὄχλος Ἡμεῖς ἠκούσαμεν ἐκ τοῦ νόμου ὅτι ὁ Χριστὸς μένει εἰς τὸν αἰῶνα, καὶ πῶς λέγεις σὺ ὅτι δεῖ ὑψωθῆναι τὸν Υἱὸν τοῦ ἀνθρώπου; τίς ἐστιν οὗτος ὁ Υἱὸς τοῦ ἀνθρώπου;

Then John uniquely indicated that the crowd (ὁ ὄχλος) answered Jesus (ἀπεκρίθη οὖν αὐτῷ) that they had heard (Ἡμεῖς ἠκούσαμεν) from the law (ἐκ τοῦ νόμου) that the Christ (ὅτι ὁ Χριστὸς), the Messiah, would remain forever into eternity (μένει εἰς τὸν αἰῶνα).  How can Jesus say (καὶ πῶς λέγεις σὺ) that the Son of Man (τὸν Υἱὸν τοῦ ἀνθρώπου) must be lifted up (ὅτι δεῖ ὑψωθῆναι)?  Who is this (τίς ἐστιν οὗτος) Son of man (ὁ Υἱὸς τοῦ ἀνθρώπου)?  Jesus seemed to have this dialog with this Jewish crowd around him.  They or someone in the crowd wanted to know if the Christ Messiah would remain forever.  According to their understanding or what they had heard of the Law or the Torah, the Davidic savior would have an infinite run as a priestly king.  However, the Torah did not speak about a messiah.  Perhaps these ideas were based on Psalm 89:36, Psalm 110:4 and Ezekiel, chapter 37:25, which were not precisely part of the Torah.  The Son of Man came out of the prophetic work of Daniel, chapter 7:13-14, but these questioners wanted a more precise answer.  Do you get an answer to your questions?