"The happiness of a man in this life does not consist in the absence but in the mastery of his passions." -- Alfred Lord Tennyson  

"Passion, though a bad regulator, is a powerful spring." -- Ralph Waldo Emerson  

"It has meant a lot to me to challenge the best players in the world and to beat them. And it means a lot to me to be out here and fighting for the title and, you know, it hurts not to win it." -- Andre Agassi 

"You have to find something that you love enough to be able to take risks, jump over the hurdles and break through the brick walls that are always going to be placed in front of you. If you don't have that kind of feeling for what it is you're doing, you'll stop at the first giant hurdle."-– George Lucas  

"Seek out that particular mental attribute which makes you feel most deeply and vitally alive, along with which comes the inner voice which says, 'This is the real me,' and when you have found that attitude, follow it."-– William James