Ver. 7. Isaiah desired purity, and his prayer also was answered.

(7) And he laid it upon my mouth. "And one cried unto another, and said, Holy, holy, holy, [is] the LORD of hosts: the whole earth [is] full … —So Jehovah “touched the mouth” of Isaiah’s great successor (Jeremiah 1:9); but not in that case with a “coal from the altar.”That prophet, like Moses (Exodus 4:10), had felt only or chiefly the want of power (“Alas!I cannot speak), and power was given him. And he laid it upon my mouth. Isaiah 6:7 And he laid [it] upon my mouth Because he had complained of the impurity of his lips, and that his mouth might take in by faith this comfortable doctrine of pardon, and it might be filled with praise and thankfulness; it denotes the ministration of the Gospel, as a means of the application of pardoning grace: and said, lo, this hath touched thy lips ;

Isaiah 6:7 And he laid [it] upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.