"Bringing about change is not just 'eat your peas,'" he said. "There should be some joy in it. It shouldn't just be a burden. What an amazing gift, an extraordinary privilege to be able to make the world better. To work with others and be able to look back ... and say that child has an education because of the work I did, that person has health care, because of the steps I took, that group of people that didn't have a voice now has a voice."