身份是脆弱的东西，容易丢失，难以重获。
"The past is always carried into the present by small things."
有真才能的人不依恃才能，有真学问的人不夸耀学问。
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
Knowledge is represented in distributed patterns of activation across networks of neurons.