But when his heart was lifted up - See Daniel 4:30.
And his mind hardened in pride - Margin, “to deal proudly.” The state of mind indicated here is that in which there is no sense of dependence, but where one feels that he has all resources in himself, and need only look to himself.
He was deposed from his kingly throne - Margin, “made to come down.” That is, he was so deposed by the providence of God, not by the acts of his own subjects.