Isaiah 40:27-31

27You Israelites, descendants of Jacob, say, ‘The Lord does not know about our troubles. He does not bring justice to us.’ Why do you say that?

28You must surely know what is true! You must have heard about it. The Lord is the God who lives for ever. He made the whole earth, near and far. He never becomes tired or weak. He knows and he understands everything.

29He makes tired people strong again. When people have become weak, he gives them more strength.

30Even young people become tired and weak. Even strong young men may slip and fall down.

31But people who wait for the Lord to help them will receive new strength. They will rise up high, as if they have the wings of eagles. They will run and they will not become tired. They will walk and they will not become weak.