And thou his son, O Belshazzar,.... His grandson; See Gill on Dan 5:1, hast not humbled thine heart; so as to acknowledge the most high God, and his dependence on him; to own him as his Sovereign, by whom he held his crown and kingdom, and to whom he was accountable; but, on the contrary, lifted up his heart in pride and haughtiness against him: though thou knewest all this; either by the relation of others, his father and mother, and others; or being an eyewitness of it himself; wherefore his sin was the more aggravated, since he had had an example before him of pride being humbled in a very awful manner, and yet took no warning by it.