And at the end of the days I Nebuchadnezzar lifted up my eyes unto heaven, and my understanding returned unto me, and I blessed the most High, and I praised and honored him that lives forever, whose dominion is an everlasting dominion, and his kingdom is from generation to generation:
All Commentaries on Daniel 4:34 Go To Daniel 4
Jerome
AD 420
Had he not raised his eyes towards heaven, he would not have regained his former intelligence. Moreover, when he says that his intelligence returned to him, he shows that he had lost not his outward appearance but only his mind.