The COVID scare seems to have changed the landscape of exercise. Now there are so many walkers of all ages that it’s hard to avoid them. It seems to have become a national hobby, even though walking has been deeply unfashionable in America ever since the invention of the motor car. People will normally go to great lengths to avoid walking even a few steps, as you can observe in any supermarket parking lot as drivers compete for the parking spaces closest to the entrance. Walking is in fact quite easy. I learned to do it at the age of about fourteen months, after what seemed like a long time crawling around on the floor, and I’ve been walking ever since. I liked it from the start. It is more dignified than crawling, and faster, and allows me to see more things. Some medical authorities have even suggested that walking may be good for our physical health, although we should probably reserve judgement on that. There is more reason to believe that walking is good for our mental health,