Ezekiel had prostrated himself in adoration and awe of the sight of the outline of the human form of God and His majestic throne upon the Cherubim under the glorious rakeeah. As God is preparing to speak to Ezekiel He calls him a Son of Man. In Hebrew this is ben adam and God only uses it only in reference to His select prophets and of Himself as Messiah. It is used in Daniel 8:17 when God spoke to him with some end time prophesies. When He (God) entered the Messiah our Lord Jesus and became a man as in Adam the first man He called Himself The Son of Man. It is used ninety-three times in this book. Paul told us of one aspect of the relationship of the Lord Jesus to humanity when he compared Him to Adam.
I Corinthians 15:45
45 And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit (KJV).
Daniel also saw the Lord Jesus which he recorded in Daniel 7:13 his vision of the Son of Man coming to the Ancient of Days. Because Ezekiel and Daniel both saw God as the shape or form of a human man it is clear that God is identifying with His creatures through the loving term ‚ÄúSon of Man.‚ÄĚ
God commanded him to stand to receive the message of his call and commission, which is almost exactly what an angel (probably Gabriel) spoke to Daniel in response to his request for understanding. When God commanded Ezekiel to stand it was an indication of His acceptance of Ezekiel as a worthy prophet and intention of calling that man into service.