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<blockquote><a href="http://quotationsbook.com/quote/26352/">Four thousand volumes of metaphysics will not teach us what the soul is.</a></blockquote><br> <a href="http://quotationsbook.com/quotes/author/7459/">Voltaire</a> on <a href="http://quotationsbook.com/quotes/tag/physics/">physics</a><br> Quote from <a href="http://quotationsbook.com">Quotations Book</a>