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.
Reflection is the source of wisdom.
"The world is full of signs and wonders, but we walk past them every day without seeing."
The highest form of ignorance is when you reject something you don't know anything about.