Reminds me of a favorite Shakey Graves lyric: "Night is to day as death is to dreaming." I love that line, even though I still don't really know what he means. It also just flows very well in the song, so that helps.
Sounds like he had a rather dark view the night. I don’t understand it, but it sounds like he intended to contrast the positive connotations of life and day (bright, warm, ect) with the opposites. Idk, what do you think he meant?
Well, night and day are two sides of the same eternally flipping coin, an endless cycle, back and forth forever. But dreaming isn't the flip-side of death, life is. So maybe he's saying that "life is just a dream"? Or death is dreaming, but without light? Idk, but it's from a sleep/dream-themed concept album called Can't Wake Up. I highly recommend it, it got no attention anywhere but it's easily one of my favorite albums of the last five years.