" Be like gravity, man, just like motherfucking gravity. When you chase perfection, when you make perfection the ultimate goal, do you know what you’re doing? You’re chasing something that doesn’t exist. You’re making everyone around you miserable. You’re making yourself miserable. Perfection? There’s about five times a year you wake up perfect, when you can’t lose to anybody, but it’s not those five times a year that make a tennis player. Or a human being, for that matter. It’s the other times. It’s all about your head, man. With your talent, if you’re fifty percent game-wise, but ninety-five percent head-wise, you’re going to win. But if you’re ninety-five percent game-wise and fifty percent head-wise, you’re going to lose, lose, lose. "

― Andre Agassi , Open