Isaiah 40:31

But those who wait for the Lord (who expect, look for, and hope in Him) will gain new strength and renew their power; they will lift up their wings (and rise up close to God) like eagles; they will run and not become weary, they will walk and not grow tired.

Those who wait on the Lord expect the answer. The act of waiting on God requires confident expectation, and the person waiting has engaged their faith. The answer is coming from God. God will strengthen us when we trust and put our hope in Him.