Thus the feeling I sometimes have - which all of us who work closely with aphasiacs have - that one cannot lie to an aphasiac. He cannot grasp your words, and cannot be deceived by them; but what he grasps he grasps with infallible precision, namely the expression that goes with the words, the total, spontaneous, involuntary expressiveness which can never be simulated or faked, as words alone can, too easily.
Oliver SacksIt seems that the brain always has to be active, and if the auditory parts of the brain are not getting sufficient input, then they may start to create hallucinatory sounds on their own. Although it is curious that they do not usually create noises or voices; they create music.
Oliver SacksI suspect that music has qualities both of speech and writing - partly built in, partly individually constructed - and this goes on all through one's life.
Oliver Sacks