> 'Beware of first- hand ideas!' exclaimed one of the most advanced of them. 'First-hand ideas do not really exist. They are but the physical impressions produced by love and fear, and on this gross foundation who could erect a philosophy? Let your ideas be second-hand, and if possible tenth-hand, for then they will be far removed from that disturbing element – direct observation.<p>(The Machine Stops, 1909, E.M. Forster)<p><a href="https://en.wikisource.org/wiki/The_Machine_Stops" rel="nofollow">https://en.wikisource.org/wiki/The_Machine_Stops</a>