Clean Lips

"It now becomes apparent why the 'lips' and 'mouth' have been so prominent in Isaiah 6:5-7.  The LORD seeks a messenger, and Isaiah, now cleansed, is ready and willing to be his mouthpiece.  (footnote - There may be a secondary allusion, in the unclean lips of verse 5, to Uzziah who, as a leper, would have had to cover his lip and cry, "Unclean" (2 Chron 26:21, Lev 13:45)." - Webb