“We all carry a multitude of ghosts around with us: impressions of other people, strong or weak, deep from long acquaintance or shallow with brevity. Those ghosts are maps, updated with each encounter, made detailed, judged, liked or disliked. They are, if you ask a philosopher, all we can ever really know of the other people in the world. It’s usually best not to ask philosophers anything, precisely because they have the habit of what in the Persian language is called sanud: the profitless consideration of unsettling yet inconsequential things.” (p.380)
Ref: (italics in original) Nick Harkaway (2008) The Gone-Away World. William Heinemann: London.