But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint.
Isaiah 40:31 KJV
What a great promise God has given us in this verse! Though we may be tired from the fight, God promises us that if we just wait and put our hopes and trust in him, he will help us push through and give us the strength to endure. Sometimes we feel like we can't go on anymore, we're tired of climbing that mountain, we're tired of running from something, our earthly bodies just can't endure any more, physically, mentally, emotionally. But God leaves us with a promise that we don't have to do it alone, just to wait on him and his timing. It's not that God is always saying no, sometimes he is simply saying "My child, wait..."