I think hallucinations need to be discussed. There are all sorts of hallucinations, and then many sorts which are okay, like the ones I think which most of us have in bed at night before we fall asleep, when we can see all sorts of patterns or faces and scenes.
Oliver SacksIt is easy to recollect the good things of life, the times when one's heart rejoices and expands, when everything is enfolded in kindness and love; it is easy to recollect the fineness of life-how noble one was, how generous one felt, what courage one showed in the face of adversity.
Oliver SacksThe same areas which are active in listening to music are also active when you imagine music, and this includes the motor areas, too. That explains why earlier, even though I was only thinking of the mazurka, I was thinking in terms of movement.
Oliver Sacks