Fantasy works inwards upon its author, blurring the boundary...

Fantasy works inwards upon its author, blurring the boundary between the visioned and the actual, and associating itself ever moreclosely with the Ego, so that the child who has fantasied himself a murderer ends by becoming a Loeb or a Leopold. The creative Imagination works outwards, steadily increasing the gap between the visioned and the actual, till this becomes the great gulf fixed between art and nature. Few writers of crime-stories become murderers--if any do, it is not the result of identifying themselves with their murderous heroes.