“For many centuries before modern science, and for the first two and a half centuries of modern science, the division of reality into matter and light seemed self-evident. …As long as the separation between the massive and the massless persisted, a unified description of the physical world could not be achieved.”

Source: The Lightness of Being – Mass, Ether and the Unification of Forces (2008), Ch. 1, p. 9.

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Frank Wilczek 49
physicist 1951

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“The objective world of nineteenth-century science was, as we know today, an ideal, limiting case, but not the whole reality.”

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Context: I consider those developments in physics during the last decades which have shown how problematical such concepts as "objective" and "subjective" are, a great liberation of thought. The whole thing started with the theory of relativity. In the past, the statement that two events are simultaneous was considered an objective assertion, one that could be communicated quite simply and that was open to verification by any observer. Today we know that 'simultaneity' contains a subjective element, inasmuch as two events that appear simultaneous to an observer at rest are not necessarily simultaneous to an observer in motion. However, the relativistic description is also objective inasmuch as every observer can deduce by calculation what the other observer will perceive or has perceived. For all that, we have come a long way from the classical ideal of objective descriptions.
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Source: The systems view of the world (1996), p. 8 as cited in: Martha C. Beck (2013) "Contemporary Systems Sciences, Implications for the Nature and Value of Religion, the Five Principles of Pancasila, and the Five Pillars of Islam," Dialogue and Universalism-E Volume 4, Number 1/2013. p. 3 ( online http://www.emporia.edu/~cbrown/dnue/documents/vol04.no01.2013/Vol04.01.Beck.pdf).

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