The greatest discovery of all time is Posted on July 27, 2016July 27, 2011 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: attitude Tags: attitude, Oprah Winfrey Spread the love Related posts: Your attitude, not your aptitude, will determine Take the attitude of a student, never The artist is not responsible to any If you eat something and get fat,