The greatest discovery of all time is Posted on January 21, 2013January 21, 2008 by admin “The greatest discovery of all time is that a person can change his future by merely changing his attitude.” — Oprah Winfrey Author: Oprah Winfrey Category: future Tags: future, Oprah Winfrey Spread the love Related posts: We have no right to assume that The Internet: transforming society and shaping the When you have kids, you start thinking As a leader, I am tough on