The Importance of Assuming the Very Best

"All of us have inadvertently done something in traffic that we didn't mean to cut someone else," he says. "So I have worked to train myself to do two things: Number one, to always assume that the other person just inadvertently made a mistake." And then simultaneous with that, is this going to matter in 10 years or 20 years? 'It matters that it changes your way of thinking,' Obama adds.