Concentration

Every great man has become great, every successful man has succeeded,in proportion as he has confined his powers to one particular channel. - Orison Swett Marden

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 unweavering aim, men of single and intense purpose. - Orison Swett Marden