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<blockquote><a href="http://quotationsbook.com/quote/8091/">A clear conscience is a soft pillow.</a></blockquote><br> <a href="http://quotationsbook.com/quotes/author/5874/">Proverb, German</a> on <a href="http://quotationsbook.com/quotes/tag/science/">science</a><br> Quote from <a href="http://quotationsbook.com">Quotations Book</a>