Genius is one percent inspiration and 99 percent perspiration.

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

I am not discouraged, because every wrong attempt discarded is another step forward.

Nearly every man who develops an idea works it up to the point where it looks impossible, and then gets discouraged. That's not the place to become discouraged.

Results! Why man, I have gotten a lot of results. I know several thousand things that won't work.

There is no expedient to which a man will go to avoid the real labor of thinking.