If you every find yourself having trouble explaining to someone non-musical why we musicians do what we do, introduce your friend (by taking him or her to the movies, or showing him or her the DVD when it comes out) to Seymour Bernstein. Michael and I saw the film yesterday. I'll let his thoughtful post about the film speak for both of us.
My personal feeling watching the film was one of extreme comfort. I felt musically energized, and ready to play last night's concert with all the musical connection and emotional engagement I wanted. (And it was a GREAT concert. Thanks, Seymour!)