In the OT, the phrase “son of man” usually refers to humanity in general or to a specific individual. In Ezekiel, for instance, God addresses the prophet himself as “son of man,” possibly indicating his human status compared with God or, alternatively, highlighting his unique status as God’s prophet in contrast with the rest of humanity.

One of the most crucial OT “son of man” texts is Dan. 7 because of its influence on the “Son of Man” in the Gospel tradition. The first half of the chapter records Daniel’s vision (7:1 14), while the second half contains its interpretation (7:15–27). In the vision Daniel sees “one like a son of man, coming with the clouds of heaven” (7:13). This exalted figure contrasts with the first three beasts, which are “like a lion” (7:4), “like a bear” (7:5), and “like a leopard” (7:6). The fourth beast is so gruesome that it defies comparison with any species of the animal kingdom (7:7). Many agree that the beasts likely refer to ancient world empires; however, the referent of “one like a son of man” has given rise to much debate. The figure may refer to earthly Israel, since at this figure’s vindication he is endowed with authority and glory. This is precisely what “the holy people of the Most High” receive in verse 27. In this way, the “one like a son of man” is a symbol for the persecuted, earthly saints. Alternatively, the exalted figure could be a heavenly being such as the archangel Gabriel (9:21) or Michael (10:13; 12:1). Here “one like a son of man” is the heavenly counterpart and leader of suffering Israel and fights a cosmic battle on its behalf.

In the NT the term “Son of Man” occurs mostly in the Gospels and, with the exception of John 12:34 (where the crowd quotes Jesus), is uttered exclusively by Jesus himself. Unlike in Daniel, the epithet occurs in the Gospels with the definite article, likely indicating that the Son of Man was a known figure. In first-century Judaism many Jews believed that the Son of Man would return at the end as savior and judge. The OT provides the most helpful background for understanding the Son of Man in the Gospels.

The Son of Man sayings in the Gospels fall within three categories: earthly, suffering-resurrection, and future-vindication sayings. Starting with the earthly sayings, in Mark 2:10, for example, the Son of Man has “authority on earth to forgive sins,” and in 2:28 he exercises dominion over the Sabbath. Although in Daniel the Son of Man does not receive such authority until his appearance in Yahweh’s presence at his vindication, the Son of Man in the Gospels exercises such authority during his earthly ministry. Jesus also predicts that the Son of Man will suffer, die, and be raised again. In Mark, these suffering-resurrection predictions occur three times (8:31; 9:31; 10:33–34). Echoing Dan. 7, this plight of Jesus recalls the suffering of the holy ones caused by the little horn (v. 21). If the “one like a son of man” represents the holy ones in their vindication, then it is reasonable that he does so in their suffering as well; however, the text of Daniel is silent on this point. Finally, the clearest reference to Dan. 7 occurs in the future-vindication sayings. In Mark 13:26; 14:62 the Son of Man comes with/on the clouds, which points to his vindication over the Sanhedrin, the dominant adversaries of Jesus in Mark. Matthew appears to develop even more than Mark the judicial responsibilities of the Son of Man (Matt. 13:41–43; 25:31–33). Meanwhile, in Luke the church must stay alert and be prepared for the return of the Son of Man (12:39–40; 17:22–37; 21:34–36).

Finally, the Son of Man in Revelation is in the heavenly temple functioning as both judge and caretaker of the seven churches (Rev. 1:12–20) and reaps the saints while “seated on the cloud” (14:14–16).