If a man with a dog sits quietly enjoying music and smiling, his dog might sit down beside him and smile, too. But who knows whether the dog is having a comparable experience or whether the dog is simply happy that his master is happy.
Oliver SacksWith any hallucinations, if you can do functional brain imagery while theyre going on, you will find that the parts of the brain usually involved in seeing or hearing - in perception - have become super active by themselves. And this is an autonomous activity; this does not happen with imagination.
Oliver SacksEvery act of perception, is to some degree an act of creation, and every act of memory is to some degree an act of imagination.
Oliver SacksThe power of music, whether joyous or cathartic must steal on one unawares, come spontaneously as a blessing or a grace--
Oliver Sacks