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.
出自汉·桓宽《盐铁论·地广》。释义：不因为是自己的亲近就给以重赏；也不因为与自己疏远就忘掉给人恩惠。
I train, I focus, I believe, and I achieve.