There is something special that happens when a musician sits down to come up with a song. It is unlike anything else: when it works, we can all feel it. This is how we recognize the wonder of it all and why we see our musicians the way that we do. The great musicians can define an entire decade – an entire century on a long enough timescale. Their notes reverberate through our ears and down through the generations, their lyrics carrying even more meaning than they could have ever known. Whatever their genres, whatever their instruments, whatever their styles, they are doing work that is difficult to tie down, difficult even to understand beyond its raw power and impact on our lives.