"It is those who concentrates on but one thing at a time who advance in this world. The great man or woman is the one who never steps outside his or her specialty or foolishly dissipates his or her individuality"

The text in this quote suggests that individuals who focus exclusively on one thing at a time are most likely to prosper in life. According to the author, truly fantastic people do not attempt to do a lot of things at once, but rather, they adhere to their area of proficiency and work on refining their abilities in that location. By doing so, they are able to maintain their special point of view and skills, and avoid losing time and energy on pursuits that do not line up with their core strengths.