“Henceforth space by itself, and time by itself, are doomed to fade away into mere shadows, and only a kind of union of the two will preserve an independent reality.” KindTwoRealitySpaceShadowIndependentUnionsMerePreservesFadesDoomedFade Away Book:The Principle of Relativity: A Collection of Original Memoirs on the Special and General Theory of Relativity Source: The Principle of Relativity: A Collection of Original Memoirs on the Special and General Theory of Relativity