It’s winter here in Illinois, which means snow and ice. The other morning, because the sidewalks looked treacherous, I decided to take the street to work. As I trudged along, I noticed a car about three blocks ahead. I focused on it, wondering if it would turn or continue on towards me. Then the unexpected happened. Before I could do anything, I pitched forward, landing on my knees. The case with my laptop computer inside it hit the street beside me. The culprit was a pot hole, which I would have noticed if I’d not concentrated on looking ahead instead of where I was. I scrambled up and glanced around to make sure I wouldn’t get hit. The car I’d concentrated on had turned. None others were in sight. I took stock of my condition. Fortunately, I appeared to have suffered only scrapes and bruises on my knees and one elbow. My jeans were still intact. No one could even tell I’d fallen. Glad I’d got off so lightly, I continued on to the train station. Once seated on the train...