For Schopenhauer, slow melodies are the most beautifully sad. “A convulsive wail,” he calls them. Samuel Barber’s Adagio for Strings is a good example. I listen to it whenever I’m feeling sad. It is not an act of self-indulgence, a wallowing in my misery, but, I think, something more noble. The music matches my mood, validates it, yet also enables me to distance myself from the source of my sadness. I can taste sadness without swallowing it, or being swallowed by it. I can savor the bitterness.