1. Big, important book on Jewish mysticism (i.e., Qabala or however you spell it), of debatable origin, but apparently written in the 13th century. Talks about God, Sephirot, etc.

2. "Cage of fleshy existence" in Xenogears. To explain it further would spoil the story, and tire me out. (See "obscure Simpsons reference that no one gets".)