There remain some phrases in the Bible that I'm not sure about. Like Jesus getting baptized "to fulfill all righteousness." And the self-designation "son of man."
Here is a great passage from Herman Bavinck's The Wondrous Works of God that talks about the label:
All the same the term seems not to have been a common name, and seems not to have had a fixed significance. No such fleshly expectations could be connected with this name as with the name, Son of David, King of Israel. Hence this name was most suitable for Jesus, for it gave expression, on one hand, to the idea that He was the Messiah promised in prophecy, and, on the other, to the idea that He was not this according to the prevailing idea of the Jewish people.
This can be proved by the use which Jesus makes of the name. He uses this title in reference to Himself in two series of places, namely in such texts as those in which He speaks of His poverty, suffering, and humiliation, and in those in which He speaks of His might, majesty, and exaltation. Thus, for example, He says in the first kind: The Son of man came not to be ministered unto, but to minister, and to give His life a ransom for many (Matt. 20:28). In the other kind, He declares before the high court that He is in very fact the Messiah, and He adds to this the statement: Hereafter shall ye see the Son of man sitting on the right hand of power, and coming in the clouds of heaven (Matt. 26:64).
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And in that name He comprises the whole Old Testament prophecy concerning the Messiah.
