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.
If you're not prepared to be wrong, you'll never come up with anything original.
【释义】一寸大的小火苗,能够将云梦那片广袤的地区烧毁。一个小小的蚁穴能够使得大地崩坍。【延伸】小的祸患最终能够酿成大的灾祸。小毛病往往可以导致大麻烦,优秀的人就是把简单的事做到百分之百完美,细节决定成败。5
History is humanity's collective memory.