One of the angels flies to Isaiah and touches a live coal to his lips as an act of atonement for his sin and remission of his guilt. Being cleansed, he is no longer a man of unclean lips. So when God asks, "Whom shall I send?" Isaiah is able to answer, "Send me" (Isaiah 6:6-8).
Does Isaiah even know what he is volunteering for? Perhaps not. But by cleansing him God has equipped him to speak to a nation where justice is perverted, the poor are oppressed, idols are worshipped and the government looks to pagan nations for help rather than to God. But we see that just as God gave words to Moses and Jeremiah, God supplied words of prophecy to Isaiah. God does not call anyone without equipping them to do the job.
For reflection: To what mission has God called me? How has God equipped me for that mission?
Le us pray. Lord, we bow before your holiness and acknowledge that we too are a people of unclean lips. We see justice perverted and don't speak up. We see the poor oppressed and expect someone else to do something. We see our nation turn for help to anyone but you. Cleanse us of our sin, equip us with your words, and help us to proclaim your righteousness in the land. Your kingdom come, your will be done on earth as it is in heaven.