40:28 Do you not know?
Have you not heard?
The Lord is an eternal God,
the creator of the whole earth.
He does not get tired or weary;
there is no limit to his wisdom.
40:29 He gives strength to those who are tired;
to the ones who lack power, he gives renewed energy.
40:30 Even youths get tired and weary;
even strong young men clumsily stumble.