“The three great essentials to achieve anything worthwhile are, first, hard work; second, stick-to-itiveness; third, common sense.”

“I never did anything worth doing by accident, nor did any of my inventions come by accident; they came by work.”

“Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence, and honest purpose, as well as perspiration. Seeming to do is not doing”

“I have not failed. I've just found 10,000 ways that won't work.”

“We often miss opportunity because it's dressed in overalls and looks like work”

“Restlessness is discontent — and discontent is the first necessity of progress. Show me a thoroughly satisfied man — and I will show you a failure.”

“The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.”