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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.
君子这样来造船车,所以属下都效法他,因此他的人民就会饥寒交迫,不得不做奸邪的事。奸邪的事情一多,刑罚就重,刑罚一重,国家就混乱。国君若真的希望天下太平而不希望天下大乱的话,如果要做船车,就不能不节俭。
Market design is an ongoing experiment—what works today may need adjustment tomorrow.