God humbled Nebuchadnezzar. He came to repentance turning from pride to praise the Most High God declaring His Kingdom to be an everlasting Kingdom and the fulfilment of His will in heaven and on earth. The man was helpless to save himself. BUT God in His grace and mercy reaches out to regenerate man that man would have the desire to know Him, to repent and believe, and be saved. We enter the Kingdom and continue by faith to work out our salvation.