So he came near where I stood: and when he came, I was afraid, and fell upon my face: but he said unto me, Understand, O son of man: that for the time of the end shall be the vision.
All Commentaries on Daniel 8:17 Go To Daniel 8
Jerome
AD 420
Inasmuch as Ezekiel and Daniel and Zechariah behold themselves to be often in the company of angels, they were reminded of their frailty, lest they should be lifted up in pride and imagine themselves to partake of the nature or dignity of angels. Therefore they are addressed as sons of men, in order that they might realize that they are but human beings.