"Glycerine" is a ballad born from a deeply personal place, written by Gavin Rossdale in 1993 about his then-girlfriend, Suze DeMarchi. As he composed it in his London flat, Rossdale felt a mystical, ancient quality emerging, as if he were merely a conduit for something larger than himself. He perceived the song as more sophisticated than his previous work, even checking with his bandmates to ensure its originality. At its heart, this song channels a profound and almost otherworldly connection to a loved one.