“Son of man” (Greek hious tou anthrōpou), appears eighty-five times in the New Testament, eighty-one of those on the lips of Jesus, is an idiom—“a group of words in a fixed order that have a particular meaning that is different from the meanings of each word on its own.” (1)
The expression is employed to Jesus’ earthly ministry (Mk. 2:10,28; 10:45; Matt. 13:37). Second, the expression was used to describe the suffering, death and resurrection of Jesus (Mk. 8:31;9:31;10:33). Thirdly, the Son of Man has a future function as an eschatological judge (Matt. 25:31-36; Mark 14:60-65). Jesus spoke of this function in the following texts:
When the Son of Man comes in his glory, and all the angels with him, then he will sit on his glorious throne. Before him will be gathered all the nations , and he will separate them one from another as a shepherd separates the sheep from the goats, and he will place the sheep at his right hand, but the goats at the left. Then the King will say to those at his right hand, ‘Come, O blessed of my Father , inherit the kingdom prepared for you from the foundation of the world…’ Then he will say to those at his left hand, ‘Depart from me, you cursed, into the eternal fire prepared for the devil and his angels….’ And they will go away into eternal punishment, but the righteous into eternal life (Matt. 25: 31-36).
You, who have persevered with me in my tribulations, when the Son of Man sits upon his glorious throne will also sit upon thrones, judging the twelve tribes of Israel (cf. Matt. 19: 28; Luke 22: 28-30).
One of the most pertinent issues is Jesus’ use of Son of Man in the trial scene in Mark 14.
And the high priest stood up in the midst and asked Jesus, “Have you no answer to make? What is it that these men testify against you?” But he remained silent and made no answer. Again the high priest asked him, “Are you the Christ, the Son of the Blessed?” And Jesus said, “I am, and you will see the Son of Man seated at the right hand of Power, and coming with the clouds of heaven.” And the high priest tore his garments and said, “What further witnesses do we need? You have heard his blasphemy. What is your decision?” And they all condemned him as deserving death. And some began to spit on him and to cover his face and to strike him, saying to him, “Prophesy!” And the guards received him with blows (Mark 14: 60-65).
By Jesus asserting He is the Son of Man, he was exercising the authority of God. It is for this reason that we don’t want to minimize why Jesus earned the charge of blasphemy here. According to Jewish law, the claim to be the Messiah was not a criminal or capital offense. If this is true, why was Jesus accused of blasphemy? Jesus affirmed the chief priest’s question that He was not only the Messiah but also the Coming Son of Man who would judge the world and would sit at the right hand of God. This was considered a claim to deity since the eschatological authority of judgment was for God alone. Hence, Jesus provoked the indignation of his opponents because of His application of Daniel 7:13-14 and Psalm 110:1 to himself. We shouldn’t overlook the emphasis on how the Son of Man is seated at the right hand of God. Both Peter and Paul recognize this important characteristic of Jesus after he is resurrected:
This Jesus God raised up, and of that we all are witnesses. Being therefore exalted at the right hand of God, and having received from the Father the promise of the Holy Spirit, he has poured out this that you yourselves are seeing and hearing. For David did not ascend into the heavens, but he himself says,” ‘The Lord said to my Lord, “Sit at my right hand, until I make your enemies your footstool (Acts 2: 32-36).
I do not cease to give thanks for you, remembering you in my prayers, that the God of our Lord Jesus Christ, the Father of glory, may give you the Spirit of wisdom and of revelation in the knowledge of him, having the eyes of your hearts enlightened, that you may know what is the hope to which he has called you, what are the riches of his glorious inheritance in the saints, and what is the immeasurable greatness of his power toward us who believe, according to the working of his great might that he worked in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come. And he put all things under his feet and gave him as head over all things to the church, which is his body, the fullness of him who fills all in all (Ephesians 1:17-22).
In relation to Mark 14:61-62, R. Kendall Soulen says;
An example of how Jesus shows reverence for the divine name by avoiding its direct use is found in Mark’s account of his trial before the high priest. Again the high priest asked him, “Are you the Messiah, the Son of the Blessed One?” Jesus said, “I am; and ‘you will see the Son of Man seated at the right hand of the Power,’ and ‘coming with the clouds of heaven.’” (Mark 14:61–62)
“Here both Jesus and …the high priest use circumlocutions in place of the divine name. “The Blessed One” and “the Power” are not freestanding designations that stand independently in their own right, like “God,” but stand-in names used in place of the divine name. Jesus and the high priest use different circumlocutions, but they have no difficulty in understanding each other. Each perceives the other to be making a veiled reference to the one God who is distinguished from every other reality in heaven and on earth by the bearing of the unspoken divine name. From a historical point of view, it is not surprising that the Gospels should portray Jesus as avoiding the direct use of the divine name. By the first century, such avoidance was normative across the variety of Second Temple Judaism’s, an axiomatic feature of what later rabbinic tradition would refer to as “oral Torah” or “oral law.” It would be startling if Jesus did not honor the practice. The more important question is whether Jesus assigned any importance to it, or whether he regarded it, as many Christians subsequently would, as something essentially perishable destined to become “dead and deadly,” along with the rest of Jewish ceremonial law.”- (2)
Daniel 7:13-14 and the Son of Man
I saw in the night visions, 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. 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. -Daniel 7:13-14
When it comes to this text, the debate is over the referent. The figure in the text is given a rule over God’s kingdom. All people groups are seen as seen as serving and worshiping this figure. The ESV translates it as “a son of man” while the JPS translates it as “a human being” which is a paraphrase. Some Jewish interpretations have interpreted the text to be about a human collectively (i.e., the people of God who are “personalized as the Messiah”). The evidence for the collective interpretation is seen in the following texts:
But the saints of the Most High shall receive the kingdom and possess the kingdom forever, forever and ever.”- Daniel 7:18
And the kingdom and the dominion and the greatness of the kingdoms under the whole heaven shall be given to the people of the saints of the Most High; his kingdom shall be an everlasting kingdom, and all dominions shall serve and obey him.- Daniel 7:28 
A quick glance here would seem to indicate that the collective interpretation has some merit. However, a closer reading reveals some challenges with interpreting the Dan 7:13-14 text as referring to a collective group. First, this text reveals God is bringing a figure with a status over angelic millions in a heavenly court scene. If anything, the people on earth are supposed to find a tremendous future for themselves in this royal figure. Secondly, as already mentioned, all peoples, nations, and languages will serve the figure in Dan. 7:13-14. When “serve” is used here and in other parts of the book of Daniel it means to “pay reverence to” as seen in Dan.3:12, 14, 17, 18, 28; 6:1617; 20; 21; 7:14, 27. So now the question becomes how anyone can pay reverence to anyone other than God?
This would make sense given the context shows this type of vision would be one of hope for the generation of people that would read this text. Another challenge to the collective interpretation is that the figure in Dan 7:13-14 is coming with the clouds of heaven. Daniel Boyarin says the following:
From the earliest layers of interpretation and right up to the modern times, some interpreters have deemed the “one like a son of man” as symbol of a collective, namely, the faithful Israelites at the time of the Maccabean revolt, when the book of Daniel was probably written. Other interpreters have insisted that “[one like a] son of man” is a second divine figure alongside the Ancient of Days and not an allegorical symbol of the People of Israel. We find in Aphrahat, the fourth century Iranian Father of the Church, the following attack on the interpretation (presumably by Jews) that makes the “one like a son of man” out to be the People of Israel: “Have the children of Israel received the kingdom of the Most High? God forbid! Or has that people come on the cloud of heaven?”…Aphrahat’s argument is exegetical and very much to the point. Clouds-as well as riding on or with clouds- are a common attribute of biblical divine appearances, called theophanies (Greek for “God appearances”) by scholars. J.A. Emerton has made the point decisively: “The act of coming in the clouds suggests a theophany of [YHVH] himself. If Dan vii.13 does not refer to a divine being, then it is the only exception out of about seventy passages in the Old Testament.
Thirdly, the collective interpretation of Dan 7:13-14 faces some stern opposition in the Pseudepigrapha which commonly refers to numerous works of Jewish religious literature written from about 200 BC to 200 AD.
As Randall Price notes:
The concept of the Messiah as a “son of man” after the figure in Daniel 7:13 is expressed in a section of the apocryphal book of 1 Enoch known as Similitudes, which has been argued to have a date as early as 40 B.C. It should be noted that scholars have found in Similitudes four features for this figure: (1) it refers to an individual and is not a collective symbol, (2) it is clearly identified as the Messiah, (3) the Messiah is preexistent and associated with prerogatives traditionally reserved for God, and (4) the Messiah takes an active role in the defeat of the ungodly. New Testament parallels with Similitudes (e.g., Matt. 19:28 with 1 Enoch 45:3 and Jn. 5:22 with 1 Enoch 61:8) may further attest to a mutual dependence on a common Jewish messianic interpretation (or tradition) based on Daniel’s vision. 
Even though the writings in Enoch are not part of the Protestant Canon they are dated just before or around the time of Jesus. Thus, they help provide the historian with valuable information into the Jewish religious life and thinking patterns at the time of Jesus. The following examples are adapted from The Messiah Texts by Raphel Patai. 
And there I saw him who is the Head of Days, and His head was white like wool, and with him was another one whose countenance had the appearance of a man And his face was full of graciousness, like one of holy angels. And I asked the angel who went with me and showed me all the hidden things about the Son of Man: Who is he and whence is he and why did he go with the Head of Days? And he answered and said to me: This is the Son of Man who has righteousness, With whom dwells righteousness, And who reveals all the treasures of the crowns, For the Lord of Spirits chose him. (1 Enoch 46:1-3)
He shall be a staff for the righteous. Whereon to lean, to stand and not to fall,And he shall be a light to the nations, And hope for the troubled of heart. And all the earth dwellers before him shall fall down, And worship and praise and bless and sing to the Lord of Spirits. It is for this that he has been chosen and hidden before Him, even before The creation of the world and evermore.(1 Enoch 48: 4-6)
1 Enoch 51.3: The Elect One will sit on [God’s] throne.
1 Enoch 62.5: …and pain shall seize them when they see that Son of Man sitting on the throne of his glory.
1 Enoch 62.7: For the Son of Man was concealed from the beginning, and the Most High One preserved him in the presence of his power; then he revealed him to the holy and elect ones.
1 Enoch 62.14: The Lord of the Spirits will abide over them; they shall eat and rest and rise with that Son of Man forever and ever…
1 Enoch 69.29: Thenceforth nothing that is corruptible shall be found; for that Son of Man has appeared and has seated himself upon the throne of his glory; and all evil shall disappear from before his face; he shall go and tell to that Son of Man, and he shall be strong before the Lord of the Spirits.
It can also be noted that Rabbi Akiba (2nd century AD) proposed that one of the thrones in Dan 7:9 should be for God and another for David (a name for the Messiah).
. Amy-Jill Levine and Marc Zvi Brettler, The Bible With and Without Jesus: How Jews and Christians Read the Same Stories Differently (New York: Harper One, 2020).
. R. Kendall Soulen, The Divine Name(s) and the Holy Trinity, Volume One: Distinguishing the Voices (Divine Names and the Holy Trinity (Louisville, KY: Westminster John Knox Press, 2011), Kindle Locations, 4630 of 10377.
 C.W Morgan and R.A. Peterson, Theology in Community: The Deity of Christ (Wheaten: Crossway, 2011), 53-55.
 D. Boyrian, The Jewish Gospels (New York: The New Press, 2012), 39.
 Randall Price, The Concept of the Messiah in the Old Testament athttp://www.worldofthebible.com/Bible%20Studies/The%20Concept%20…;
 See R. Patai The Messiah Texts: Jewish Legends of Three Thousand Years (Detroit: Wayne State University Press), 1989.