Why we think of up as good and down as bad, I’m not sure. That directionality seems arbitrary, but everyone knows that heaven is above us and hell is below. When we are sad, we are feeling closer to hell than to heaven. We are feeling low. We are feeling down.
I think we must try, though, through our artmaking or loving or any of the myriad actions we perform in a day, to “sing of somewhat higher things.”