Do not many of us who fail to achieve big things. . .fail because we lack concentration--the art of concentrating the mind on the thing to be done at the proper time and to the exclusion of everything else?
John D. RockefellerThe person who starts out simply with the idea of getting rich won't succeed; you must have a larger ambition. There is no mystery in business success. If you do each day's task successfully, and stay faithfully within these natural operations of commercial laws which I talk so much about, and keep your head clear, you will come out all right.
John D. Rockefeller