Lord, your mercy is my hope, my heart rejoices in your saving power. I will sing to the Lord for his goodness to me."
The beauty of the above psalm reminded me of what Kathleen Norris wrote in one of her books concerning her mild-to-moderate depression. She found that the two things that made the most difference for her was daily exercise (in the form of a walk), and a daily reading of some of the Psalms. Medicine for body and soul.