The scientific mind does not so much provide the right answers as ask the right questions.
   Claude Levi-Strauss(b.1908); French anthropologist (来源：老牌的英语学习网站 http://www.EnglishCN.com)

To be conscious that you are ignorant is a great step to knowledge.
   Benjamin Disraeli(1804-1881);English statesman and author.