In my day, at 12 years old, which was 38 years ago, we worked out in summer months for two and a half hours. Today someone in that age group might work out for four hours, two hours in the morning and two at night.

I am so blessed. I've been way over-blessed. At 64 years old, I look forward to going to bed every night so I can wake up in the morning and see what blessing is going to come my way that day. Because you never, ever know what God's got in store for you.

You get these moments of thrill. There you are, at 3:00 in the morning, and you know something about how we evolved that nobody else in the world knows. It's a thrill of discovery. You make this breakthrough, and you find something. It's this wonderful, wonderful scavenger hunt when you got to the end. It's just so great to be a scientist.

If you read about Mussolini or Stalin or some of these other great monsters of history, they were at it all the time, that they were getting up in the morning very early. They were physically very active. They didn't eat lunch.

I often stay in Tokyo's Daikanyama neighbourhood. You can go for a peaceful morning run along the Meguro river, and it is particularly incredible during cherry blossom season.

I didn't wake up one morning and not be in the Replacements. We're all that forever, and I've just grown older. I mean, I haven't lost anything. I've gained a few things.

What I look at, success is about really being grateful. You wake up in the morning, and you're thankful that you could breathe because it's a beautiful planet we live on, and I know there is a lot of struggle and pain, but there is more joy.