Fortune editor-in-chief Clifton Leaf sat down with actor, producer, and activist Michael J. Fox to discuss the disease that has been present in his life since it was first diagnosed in 1991: Parkinson’s. “If I accept it, and I recognize it, and I look at it, and I’m honest with it, and I say, ‘This is what it is’…I can keep track of it,” Fox told Leaf. If “I don’t recognize it and I don’t accept it, it’s just this amorphous blob of goo that seeps into every cranny of my life and confuse things.” Fox’s namesake foundation is dedicated to finding a cure for Parkinson’s disease and assisting the development of improved therapies for those living with it. (The foundation has deployed some $900 million to research the disease, rivaling the U.S. government’s spending.) In conversation, Fox explained how he’s encouraging patients to come forward and contribute to research.