The most fundamental observation that one can make about the observable universe, apart from the mysterious fact that it exists at all – prompting the ultimate question of philosophy, why there is something rather than nothing – is that there are at all levels forces that tend to coherence and unification, and forces that tend to incoherence and separation. The tension between them seems to be an inalienable condition of existence, regardless of the level at which one contemplates it. The hemispheres of the human brain, I believe, are an expression of this necessary tension. And the two
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