Isaiah 50:2-4

When I came to you, why was no one there? When I called, why did no one answer? Am I powerless to rescue you or too weak to deliver you? With only a threat I can evaporate the sea and dry up the rivers as a desert, leaving the fish to rot and die of thirst. I dress the sky with darkness and shroud it with sackcloth.” The Lord YAHWEH has equipped me with the anointed, skillful tongue of a teacher — to know how to speak a timely word to the weary. Morning by morning, he awakens my heart. He opens my ears to hear his voice, to be trained to teach.