Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
There ain't no rules around here! We're trying to accomplish something!
I have not failed. I've just found 10,000 ways that do not work.
For most of my life I refused to work at any problem unless its solution seemed to be capable of being put to commercial use.
Genius is one percent inspiration, ninety-nine percent perspiration.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Many of life's failures are people who did not realize how close they were to success when they gave up.