When he turned proud and boasted in the “power and glory of my majesty” (Daniel 4:30), Nebuchadnezzar was “driven away from mankind and began eating grass like cattle” (v. 33). Boasting in glory diminished his glory.
He later came to his senses, and coming to his senses meant confessing that the dominion of the Most High is everlasting and that “He does according to His will in the host of heaven and among the inhabitants of earth” (vv. 34-35). And then “my majesty and splendor were restored to me” (v. 36).
Confessing the Lord’s glory and dominion didn’t dilute Nebuchadnezzar’s glory and majesty. Nebuchadnezzar had glory of his own only by confessing the Lord’s glory. Because the Lord has all dominion and glory in order to share it.