Isaiah 40:31 answers the question of how to wait on the Lord by pointing away from technique and toward trustful dependence on the God who gives power to the weak. The strength it promises is renewed endurance, pictured as rising, running, and walking.

Isaiah 40:31 does not promise success to the capable but renewal to those who have already fainted. Its strength comes from Yahweh himself, received by waiting on him rather than by relying on youth or personal reserves.