In giving some better traits in Nebuchadnezzar’s character, Daniel agrees with Jer 39:11; Jer 42:12.
changed the king’s word - have made the king’s attempt to coerce into obedience vain. Have set aside his word (so “alter ... word,” Ezr 6:11) from regard to God. Nebuchadnezzar now admits that God’s law should be obeyed, rather than his (Act 5:29).
yielded ... bodies - namely, to the fire.
not serve - by sacrificing.
nor worship - by prostration of the body. Decision for God at last gains the respect even of the worldly (Pro 16:7).