Isaiah 6:4 - Exposition

The posts of the door moved ; rather, the bases of the thresholds shook (compare Revised Version). The shout of the seraphs shook the very foundations on which the thresholds of the gates of heaven rested—a testimony to the energy with which it was uttered. At the voice of him that cried ; i.e. "at the voice of each and all." The house was filled with smoke. "Smoke" is sometimes the mere sign of the presence of God, as in Isaiah 4:5 ; but more often it indicates his presence in anger or judgment (see Exodus 19:18 ; Exodus 20:18 ; Revelation 15:8 ). Here there had been no smoke at first, and we must suppose it, therefore, a sign of the anger which finds vent in verse 9-12.