Chris Weidman on the psychology of doubt and faith

Chris Weidman's psychology degree comes in handy for him in MMA. He has a very strong mental game and knows how to mentally get in the right state for peak performance and victory:  

You always have doubts that crawl up into your mind...I think one of the biggest parts of having a winner's mindset is to be able to deal with those doubts. Erase them out of your mind.