Then one of the seraphim flew to me, with a glowing coal in his hand, which he had taken with tongs from the alter. He touched my mouth with it, and said, ‘Look, this has touched your lips; your iniquity is removed, and your sin atoned for.’
Isaiah has one of the mostpowerful visions in all of Torah. He looks up to see angels announcing the presence of Hashem – the name of the unpronounceable letters YHVH.