21 And he was driven from the sons of men; and his heart  was made like the beasts, and his dwelling was with the wild asses: they fed him with grass like oxen, and his body was wet with the dew of heaven; till he knew that the most high God ruled in the kingdom of men, and that he appointeth over it whomsoever he will.
21 He was driven away from people and given the mind of an animal; he lived with the wild donkeys and ate grass like the ox; and his body was drenched with the dew of heaven, until he acknowledged that the Most High God is sovereign over all kingdoms on earth and sets over them anyone he wishes.
21 He was driven from among the children of mankind, and his mind was made like that of a beast, and his dwelling was with the wild donkeys. He was fed grass like an ox, and his body was wet with the dew of heaven, until he knew that the Most High God rules the kingdom of mankind and sets over it whom he will.
21 He was thrown out of human company, lost his mind, and lived like a wild animal. He ate grass like an ox and was soaked by heaven's dew until he learned his lesson: that the High God rules human kingdoms and puts anyone he wants in charge.
21 Then he was driven from the sons of men, his heart was made like the beasts, and his dwelling was with the wild donkeys. They fed him with grass like oxen, and his body was wet with the dew of heaven, till he knew that the Most High God rules in the kingdom of men, and appoints over it whomever He chooses.
21 He was driven from human society. He was given the mind of a wild animal, and he lived among the wild donkeys. He ate grass like a cow, and he was drenched with the dew of heaven, until he learned that the Most High God rules over the kingdoms of the world and appoints anyone he desires to rule over them.
Matthew Henry's Commentary on Daniel 5:21
Commentary on Daniel 5:18-31
(Read Daniel 5:18-31)
Daniel reads Belshazzar's doom. He had not taken warning by the judgments upon Nebuchadnezzar. And he had insulted God. Sinners are pleased with gods that neither see, nor hear, nor know; but they will be judged by One to whom all things are open. Daniel reads the sentence written on the wall. All this may well be applied to the doom of every sinner. At death, the sinner's days are numbered and finished; after death is the judgment, when he will be weighed in the balance, and found wanting; and after judgment the sinner will be cut asunder, and given as a prey to the devil and his angels. While these things were passing in the palace, it is considered that the army of Cyrus entered the city; and when Belshazzar was slain, a general submission followed. Soon will every impenitent sinner find the writing of God's word brought to pass upon him, whether he is weighed in the balance of the law as a self-righteous Pharisee, or in that of the gospel as a painted hypocrite.