I have always liked running, so it wasn't particularly difficult to make it a habit. All you need is a pair of running shoes and you can do it anywhere. It does not require anybody to do it with, and so I found the sport perfectly fits me as a person who tends to be independent and individualistic.
I didn't start running because somebody asked me to become a runner. Just like I didn't become a novelist because someone asked me to. One day, out of the blue, I wanted to write a novel. And one day, out of the blue, I started to run-simply because I wanted to. I've always done whatever I felt like doing in life. People may try to stop me, and convince me I'm wrong, but I won't change.
Sometimes I find it too hot to run, and sometimes too cold. Or too cloudy. But I still go running. I know that if I didn't go running, I wouldn't go the next day either. It's not in human nature to take unnecessary burdens upon oneself, so one's body soon becomes disaccustomed. It mustn't do that. It's the same with writing. I write every day so that my mind doesn't become disaccustomed.