"Genius is one percent inspiration and ninety-nine percent perspiration."
"I have not failed. I've just found 10,000 ways that won't work."
"Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time."
"If we did all the things we are capable of, we would literally astound ourselves."
"What you are will show in what you do."
"The value of an idea lies in the using of it."
"Discontent is the first necessity of progress."