Success is the result of hard work.

I owe my success to the fact that I never had a clock in my workroom.

There's always gonna be another mountain, I'm always gonna wanna make it move, Always gonna be a uphill battle, Sometimes I'm gonna have to lose, Ain't about how fast I get there, Ain't about what's waiting on the other side, It's the climb.

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

There is no substitute for hard work.

Many of life's failures are people who did not realize how close they were to success when they gave up.