Godel: "I am lying" is not self consistent.
Esche: 左右手互画
Bach： melody into self
Hofstadter thinks such "strange loops" also exhibits in self consciousness and intelligence. If you think about something you get into what you know and what you thought before but each recurrsion is different like Bach music or Godel impossibility.
有点象我与我周旋久原作我，所以跟自我意识有关。