A Touch Of Wisdom, 7/26/14

"Those people who think they know everything are a great annoyance to those of us who do."

Isaac Asimov (1920 - 1992)

Isaac Asimov was an American author and professor of biochemistry at Boston University, best known for his works of science fiction and for his popular science books. Wikipedia

To learn more http://en.wikipedia.org/wiki/Isaac_Asimov