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.
Thinking consists in envisaging, realizing structural features and structural requirements.
The study of automorphic forms is a reflection of the depth of mathematical thought.
A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.