2 Corinthians 4. I love the whole chapter and read it when I get really low, but my favorite part is the last three verses. This is from The Message: "That is why we never give up. Though our bodies are dying, our spirits are being renewed every day. For our present troubles are quite small and won't last very long. Yet they produce for us an immeasurably great glory that will last forever! So we don't look at the troubles we can see right now; rather, we look forward to what we have not yet seen. For the troubles we see will soon be over, but the joys to come will last forever."
And for those of us former pioneers, this chapter also contains the Famous Volkswagen Verses (verses 8 & 9 but you have to read the NWT to appreciate it).
Nina