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"A scientific man ought to have no wishes, no affections, - a mere heart of stone. "
http://www.brainyquote.com/quotes/authors/c/charles_darwin.html
"Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe? "
http://www.brainyquote.com/quotes/authors/s/stephen_hawking.html