It's 5:30am and it's still dark. For some reason I'm actually awake. Granted, my usual waking time is only half an hour later, but to me, voluntarily getting up early is an idea that just doesn't compute. However, I am deliberately giving up sleep for a good reason. I'm going to do some yoga to help wake myself up and, hopefully, become more flexible and strong. Since I have Multiple Sclerosis, that's very important. I'll also do some walking at lunchtime up a hill on the campus where I work.

If...