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.
The soul is placed in the body like a rough diamond, and must be polished, or the luster of it will never appear.
Corporate social responsibility is not just about philanthropy, but about creating shared value for all stakeholders.