"This book is about that bodily or mental condition or experience that has become part of me, and that I believe will reverberate to many people….The music is there the moment I have the thought of listening for it, before I can start an active process of listening. I am not even always sure that I wished to check. Often it just impinges out of the blue. Whenever I am just thinking nothing. I just seems as if it is there waiting. Waiting for me to pay it attention. Where is it? Somewhere in the distance, usually over my right shouler. About half a mile away."