Tom Waits' "Lullaby", particularly this line: "Nothing's ever yours to keep." In context of the song, it's undoubtedly a tearjerker; the song's supposed to be a disconcerting lullaby telling a child that their father is gone and very unlikely to come back. But take that line out of context and apply it to your own life. Think about it. Everything you consider to be 'yours' -- your glasses, your room, your dog, your friends, your mother, your father, your memories, your personality -- is going to be taken away from you. And there is nothing you can do to stop it from happening.