Paul was in prison, when he wrote a letter to the Philippian church. He told them of his great joy. Where did he find joy in his prison? He didn't find it there. He took it with him.
You can travel far and wide looking for joy, you won't find it. You have to take it with you. Joy comes from knowing Christ and our hope. So fill your pockets with joy to take into the dark places.
Read Fill Your Pockets with Joy
The mundane becomes inspiration.