I have learned a lot over the years. I learned to read music and to play "by ear". I learned how to read chord changes and understand the number system. I figured out how to hear the different vocal parts in a choir and pull them apart so I could teach them. I studied the different roles of the instruments in an ensemble. I grasped the concept of being able to play across chord changes and how to play consistently without speeding up or slowing down. This list could go on forever, but I'll stop with this last one. I realized that the more I learned, the more I could do.