What's Your Why?

​This has to be a quick one. I'm leaving for Germany in two hours! (more about that next time)
I've been thinking recently about my purpose, my Why. What is my reason for being on this planet? This question came up at the beginning of the semester. As we were about to start school I was told I would probably have major surgery to alleviate several medical problems which had developed in my body. 
This raised many questions. Could I give a recital this year? Would I be able to keep playing? Would I survive? I decided I wouldn't let any of the medical issues slow me down.
After a somewhat serious procedure and further testing, the medical issues ultimately turned out not to be as serious (or maybe as imminent) as we thought. However, as I was mentally processing this news and dealing with it emotionally, I began to wonder what the point of my existence was. After much reflection, I realized that secondary to caring for and loving my family, I want to be the best tuba player I can possibly be and that I want my students to be the best they can be, too. 
So I kept thinking about it. Those are worthy aspirations, but they didn't seem to be enough. They seemed to feed toward a larger, more transcendent goal: I want to help popularize our instruments and share them with as many people as will hear them.
I later realized that things like practice and getting up early to work are much easier when you can articulate the reasons you're doing them. This helped me to achieve things above and beyond the goals I had set for myself this semester, in spite of an uncertain start.
What is your Why?
Thank you for reading!