Then said I, Woe is me! for I am undone; because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the LORD of hosts. Wo is me! for I am undone - נדמיתי nidmeythi, I am become dumb. There is something exceedingly affecting in this complaint. I am a man of unclean lips; I cannot say, Holy, holy, holy! which the seraphs exclaim. They are holy; I am not so: they see God, and live; I have seen him, and must die, because I am unholy. Only the pure in heart shall see God; and they only can live in his presence for ever, Reader, lay this to heart; and instead of boasting of thy excellence, and trusting in thy might, or comforting thyself in thy comparative innocence, thou wilt also be dumb before him, because thou hast been a man of unclean lips, and because thou hast still an unclean heart.
I am undone "I am struck dumb" - נדמיתי nidmeythi, twenty-eight MSS. (five ancient) and three editions. - I understand it as from דום dum or דמם damam, silere, "to be silent;" and so it is rendered by the Syriac, Vulgate, Symmachus, and by some of the Jewish interpreters, apud Sal. b. Melec. The rendering of the Syriac is תויר אני tavir ani, stupens, attonitus sum, "I am amazed." He immediately gives the reason why he was struck dumb: because he was a man of polluted lips, and dwelt among a people of polluted lips, and was unworthy, either to join the seraphim in singing praises to God, or to be the messenger of God to his people. Compare Exodus 4:10; Exodus 6:12; Jeremiah 1:6.