Notice in every quote below, focusing is mentioned.
Succeeding at any task requires the power of focus!
"Concentrate all your thoughts on the task at hand. The sun's rays do not burn until brought to a focus." - Alexander Graham Bell
"Persons with comparatively moderate powers will accomplish much if they apply themselves wholly and indefatigably to one thing at a time." - Samuel Smiles
"The first requisite for success is to apply your physical and mental energies to one problem incessantly without growing weary." - Thomas Edison
"Gather in your resources, rally all your faculties, marshal all your energies, focus all your capabilities upon mastery of at least one field of endeavor." - John Haggai
"Concentration, in its truest, unadulterated form, means the ability to focus the mind on one single solitary thing." - Komar
From "Eat That Frog!" by Brian Tracy