3:28 [Then] Nebuchadnezzar spake, and said, {m} Blessed [be] the God of Shadrach, Meshach, and Abednego, who hath sent his angel, and delivered his servants that trusted in him, and have changed the king's word, and yielded their bodies, that they might not serve nor worship any god, except their own God.
(m) He was moved by the greatness of the miracle to praise God, but his heart was not touched. And here we see that miracles are not sufficient to convert men to God, but that doctrine most chiefly be joined with them, without which there can be no faith.
3:28-30 What God did for these his servants, would help to keep the Jews to their religion while in captivity, and to cure them of idolatry. The miracle brought deep convictions on Nebuchadnezzar. But no abiding change then took place in his conduct. He who preserved these pious Jews in the fiery furnace, is able to uphold us in the hour of temptation, and to keep us from falling into sin.
