John Gills Exposition of the Bible Commentary - Isaiah 6:4
And the posts of the door moved at the voice of him that cried ,.... That is, the posts of the door of the temple, as the Targum adds, where this vision was seen, as represented to the prophet. Some think this respects the earthquake in Uzziah's time, mentioned in Zechariah 14:5 and which they suppose was at the time he attempted to offer incense, and was smitten with leprosy; but, as Kimchi observes, this moving of the door posts was only in the vision of prophecy, and not in reality;... read more
Matthew Henry's Complete Commentary - Isaiah 6:1-4
The vision which Isaiah saw when he was, as is said of Samuel, established to be a prophet of the Lord (1 Sam. 3:20), was intended, 1. To confirm his faith, that he might himself be abundantly satisfied of the truth of those things which should afterwards be made known to him. This God opened the communications of himself to him; but such visions needed not to be afterwards repeated upon every revelation. Thus God appeared at first as a God of glory to Abraham (Acts 7:2), and to Moses, Exod.... read more