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<blockquote><a href="http://quotationsbook.com/quote/22192/">To know yet to think that one does not know is best; Not to know yet to think that one knows will lead to difficulty.</a></blockquote><br> <a href="http://quotationsbook.com/quotes/author/4227/">Lao-Tzu</a> on <a href="http://quotationsbook.com/quotes/tag/knowledge/">knowledge</a><br> Quote from <a href="http://quotationsbook.com">Quotations Book</a>