It was the urge to defy reality by the destruction of every living value, for the sake of proving to himself that he could exist in defiance of reality and would never have to be bound by any solid, immutable facts.
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It is one of the immutable laws of physics.
We tend to think that history is written in stone, that it’s unchanging, immutable, fixed. But history isn’t a one-way conversation; it’s a continuing dialogue between the past and the present.
Richard Stengel -- A New Take on J.F.K., Time Magazine, 6/21/07