I never could have done what I have done without the habits of punctuality, order, and diligence, without the determination to concentrate myself on one subject at a time...

The giants of the race have been men of concentration, who have struck sledge-hammer blows in one place until they have accomplished their purpose. The successful men of today are men of one overmastering idea, one unwavering aim, men of single and intense purpose.

When every physical and mental resource is focused, one's power to solve a problem multiplies tremendously.

Nothing can add more power to your life than concentrating all your energies on a limited set of targets.

Any individual can be, in time, what he earnestly desires to be, if he but set his face steadfastly in the direction of that one thing and bring all his powers to bear upon its attainment.

Singleness of purpose is one of the chief essentials for success in life, no matter what may be one's aim.