Lisp is worth learning for the profound enlightenment experience you will have when you finally get it; that experience will make you a better programmer for the rest of your days, even if you never actually use Lisp itself a lot.

人一生中主要的任务是诞生自己，成为他潜在的样子。他努力的最重要成果是他自己的个性。

Believe in yourself and all that you are. Know that there is something inside you that is greater than any obstacle.

地球并非刚体，其对力的响应必须被视为弹性体。