The happiness of melancholy:

I’m crazy about the famously melancholic singer-songwriter Leonard Cohen, who has probably never written a single song outside the minor key.  When I listen to Cohen’s musings on love, loss and yearning, I feel happy. But it’s not an exultant kind of happiness. It feels more like a marvelling at the fragile beauty of the human condition, and a pleasure in having someone articulate it so sensitively.

From here

And I would add – this is why it is so essential to sing songs of lament in church.