3:19-27 Let Nebuchadnezzar heat his furnace as hot as he can, a few minutes will finish the torment of those cast into it; but hell-fire tortures, and yet does not kill. Those who worshipped the beast and his image, have no rest, no pause, no moment free from pain, Re 14:10,11. Now was fulfilled in the letter that great promise, Isa 43:2, When thou walkest through the fire, thou shalt not be burned. Leaving it to that God who preserved them in the fire, to bring them out, they walked up and down in the midst, supported and encouraged by the presence of the Son of God. Those who suffer for Christ, have his presence in their sufferings, even in the fiery furnace, and in the valley of the shadow of death. Nebuchadnezzar owns them for servants of the most high God; a God able to deliver them out of his hand. It is our God only is the consuming fire, Heb 12:29. Could we but see into the eternal world, we should behold the persecuted believer safe from the malice of his foes, while they are exposed to the wrath of God, and tormented in unquenchable fires.

26. the most high God—He acknowledges Jehovah to be supreme above other gods (not that he ceased to believe in these); so he returns to his original confession, "your God is a God of gods" (Da 2:47), from which he had swerved in the interim, perhaps intoxicated by his success in taking Jerusalem, whose God he therefore thought unable to defend it.