I have no choice about whether or not I have Parkinson's. I have nothing but choices about how I react to it. In those choices, there's freedom to do a lot of things in areas that I wouldn't have otherwise found myself in.

The first part of my life was to be an actor and maybe have some success at that. Then [it was time] to find somebody to be in a relationship with and have a life that way. Because of Parkinson's, I had to change: How can I be of service here? Is there something unique to my situation that I can use to help people? I did not have the wherewithal to invent that. It just happened in front of me and had me join in.

There's an idea I came across a few years ago that I love: My happiness grows in direct proportion to my acceptance and in inverse proportion to my expectations. That's the key for me. If I can accept the truth of 'This is what I'm facing - not what can I expect but what I am experiencing now' - then I have all this freedom to do other things.

But the key to our marriage is the capacity to give each other a break. And to realize that it's not how our similarities work together; it's how our differences work together.

As much as Parkinson's is about movement, the end stage is being frozen. So the more I let that happen, the more I'm gonna be stuck within that and unable to reverse it.

I mean, I enjoy my work as an actor. But to make a difference in people's lives through advocacy and through supporting research - that's the kind of privilege that few people will get, and it's certainly bigger than being on TV every Thursday for half an hour.

Life is the power that's greater than I can ever comprehend.