The first requisite for success is to develop the ability to focus.

My success is due more to my ability to work continuously on one thing without stopping than to any other single quality.

The secret of success is focus of purpose.

Success is the product of the severest kind of mental and physical application.

If there is any one secret of success, it lies in the ability to get the other person's point of view and see things from that person's angle as well as from your own.

I'm either going to go completely mental, completely bankrupt, or have the best success of my life.