Thematic Bible: Qualified by God

Then I said: Woe is me, for I am ruined, because I am a man of unclean lips and live among a people of unclean lips, [and] because my eyes have seen the King, the Lord of Hosts. Then one of the seraphim flew to me, and in his hand was a glowing coal that he had taken from the altar with tongs. He touched my mouth [with it] and said: Now that this has touched your lips, your wickedness is removed, and your sin is atoned for.

not that we are competent in ourselves to consider anything as coming from ourselves, but our competence is from God. He has made us competent to be ministers of a new covenant, not of the letter, but of the Spirit; for the letter kills, but the Spirit produces life.