“One of the keys to thinking big is total focus, I think of it almost as a controlled neurosis, which is a quality I’ve noticed in many highly successful entrepreneurs. They’re obsessive, they’re driven , they’re single-minded and sometimes they’re almost maniacal, but it’s all channeled into their work. Where other people are paralyzed by neurosis, the people I’m talking about are actually helped by it…..

I don’t say this trait leads to a happier life, or a better life, but it’s great when it comes to getting what you want. “

Donald Trump, The Art of The Deal