You could fill libraries with what I don't know about music. There's always something more to learn. Now, musicians aren't particularly good role models in society. We really don't have a very good reputation. And I'm not just talking about rock musicians.
Classical musicians have just as bad a reputation.
Both joyous and sad. Something impossible to explain in words. Our instruments connect us to this mystery and a musician will maintain this sense of wonder 'til the day he or she dies. I had the privilege of spending some time with the great arranger Gil Evans in the last year of his life. He was still listening, still open to new ideas, still open to the wonder of music.