Hippolytus of Rome : Then Nebuchadnezzar seeing what happened "was amazed and rose up in haste and he heard their hymns and he said to his nobles 'Did we not cast three men bound into the midst of the fire?' But they said, 'Truly O king.' He answered and said, 'Here I indeed see four men speaking and walking in the midst of the fire and there is no destruction in them and the appearance of the fourth is like a son of God.'" [Daniel 3:25] Tell me, Nebuchadnezzar, for when did you see the Son of God, so that you confessed this one to be the Son of God? Who pricked your heart so that you plainly spoke such a word? With what sort of eyes were you able to see the light of him? But why was this shown to you alone and to none of the other satraps? But it is because it is said, "the heart of the king is in the hand of God." [Proverbs 21:1] The hand of God itself, the very thing which was the Word, pricked the heart of the king, so that you may recognize this one in the furnace and may glorify him. And this is not to be idly understood by us. For when the sons of Israel, seeing the Son of God in the world, were destined to not believe, Scripture proved that the nations were destined to recognize him in the flesh, when long ago Nebuchadnezzar seeing him not of flesh, observed him in the furnace and confessed him to be a son of God. — Commentary on Daniel 2.33.1-5 Irenaeus : If, then, neither Moses, nor Elias, nor Ezekiel, who had all many celestial visions, did see God; but if what they did see were similitudes of the splendour of the Lord, and prophecies of things to come; it is manifest that the Father is indeed invisible, of whom also the Lord said, "No man hath seen God at any time." But His Word, as He Himself willed it, and for the benefit of those who beheld, did show the Father's brightness, and explained His purposes (as also the Lord said: "The only-begotten God, which is in the bosom of the Father, He hath declared [Him];" and He does Himself also interpret the Word of the Father as being rich and great); not in one figure, nor in one character, did He appear to those seeing Him, but according to the reasons and effects aimed at in His dispensations, as it is written in Daniel. For at one time He was seen with those who were around Ananias, Azarias, Misael, as present with them in the furnace of fire, in the burning, and preserving them from [the effects of] fire: "And the appearance of the fourth," it is said, "was like to the Son of God." At another time [He is represented as] "a stone cut out of the mountain without hands," and as smiting all temporal kingdoms, and as blowing them away (ventilans ea), and as Himself filling all the earth. Then, too, is this same individual beheld as the Son of man coming in the clouds of heaven, and drawing near to the Ancient of Days, and receiving from Him all power and glory, and a kingdom. "His dominion," it is said, "is an everlasting dominion, and His kingdom shall not perish." — AGAINST HERESIES 4:20.11 Pseudo-Clement : Nebuchadnezzar, having ordered the three men to be cast into fire, saw a fourth when he looked into the furnace and said, "I see the fourth as the Son of God." He was impious and yet saw apparitions, visions and dreams. Thus, we cannot infer with absolute certainty that the one who has seen visions and dreams and apparitions is truly impious. To be sure, for the devout person, the truth gushes up natural and pure in his mind, and not by way of dreams. — PSEUDO-CLEMENTINE HOMILIES 17