The ability to concentrate and to use time well is everything.
Work
Thomas Jefferson
Thomas A. Edison
Beverly Sills
John D. Rockefeller III
The road to happiness lies in two simple principles: find what it is that interests you and that you can do well, and when
Franklin D. Roosevelt
Mother Teresa
Katharine Graham
Martin Luther King, Jr.
If a man is called to be a street-sweeper, he should sweep streets even as Michelangelo painted, or Beethoven composed music or Shakespeare wrote
Helen Keller
The world is moved not only by the mighty shoves of the heroes, but also by the aggregate of the tiny pushes of each