You cannot be sure of having something unless you cry out it to yourself, like an hungry infant.

Intention without passion has no wings

In my experience, there is only one motivation, and that is desire. No reasons or principle contain it or stand against it.

He wasn't his usual self, with that desire to win points and how he says to players: 'You have to beat me', ... Maybe he was concerned on getting himself right for the US Open.

Most people can motivate themselves to do things simply by knowing that those things need to be done. But not me. For me, motivation is this horrible, scary game where I try to make myself do something while I actively avoid doing it. If I win, I have to do something I don't want to do. And if I lose, I'm one step closer to ruining my entire life. And I never know whether I'm going to win or lose until the last second.

Laugh at yourself and your heart will lift up with joy!