The best thinking has been done in solitude. The worst has been done in turmoil

Success is 10 percent inspiration and 90 percent perspiration

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

The reason a lot of people do not recognize opportunity is because it usually goes around wearing overalls looking like hard work.

Most people don't recognize opportunity when it comes, because it's usually dressed in overalls and looks a lot like work

Opportunity is missed by most people because it is dressed in overalls and looks like work

Genius is one percent inspiration and ninety-nine percent perspiration

Maturity is often more absurd than youth and very frequently is most unjust to youth

Keep on the lookout for novel ideas that others have used successfully. Your idea has to be original only in its adaptation to the problem you're working on

Great ideas originate in the muscles