Lyric discussion by Salvar 

Cover art for Proverbs 6:27 lyrics by Mountain Goats, The

This sounds like a song about depression. Sitting inside during interminable rain, unable to muster the effort to do anything but watch old movies and get pretty sentimental. This might be reaching a bit, but the last verse sounds almost like beginning to feel the depression slip away, and missing the privacy and intensity of those shadows.

My Interpretation