"The harder you work, the harder it is to surrender." 
- Vince Lombardi

"Nothing will work unless you do."
- Maya Angelou

"I have not failed. I've just found 10,000 ways that won't work."
- Thomas Edison

"Happiness is an attitude. We either make ourselves miserable, or happy and strong. The amount of work is the same."
- Francesca Reigler