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.

Photography is, first of all, a way of seeing. It is not seeing itself.

技术是工具，人性才是核心。

History is not just the story of the past, but a mirror to the present and a window to the future.

一家公司的真正价值取决于它对人类和地球的影响，而不仅仅是利润。