"He takes the lights of his beacons as much for granted as the sailor does the lights of real lighthouses. But the lighthouses of art do not burn with so fixed and unvarying a lustre. The light they give is always changing insensibly with each generation, now brighter, now dimmer, and often enough growing brighter once more. But we sometimes forget that the lights have to tended or they grow faint and may expire altogether. For them to burn brightly they must be fed by the devotion of some few spirits in each generation."
— Roger Fry / Transformations.