Have you not known? Have you not heard? The LORD is the everlasting God, the Creator of the ends of the earth. He does not faint or grow weary; his understanding is unsearchable. (Isaiah 40.28)
Here, Isaiah gives us a reason to hold on, a reason to continue to hope for home. He points us to our God. He reminds us what kind of God he is. Behind so many questions and so many problems lies this fundamental question: What is God like? What kind of person is he? It is as we know who our God is that we can have a real hope. Isaiah reminds us that our God does not fail. He does not make promises and then finds that he doesn't have enough oomph to keep them. He is the one, after all, who created all of this. And then, Isaiah reminds us that our God understands what is going on. In fact, he knows the situation so much better than we do - so much better. So, our struggles with life are not because our God has somehow dropped the ball. Yes, there seems to be a gap between what has been promised - home - and what we actually experience. But that's not because our God has blown it.