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.
最好的解决方案往往来自倾听——倾听海洋、倾听鱼类，以及依赖它们的社区。
The only real life is the life of the mind.