A few years ago I had some words with an older gentleman on the subway. We beefed about space, seating, something trivial. I’d see him after that–never forgetting an enemy–and took a small degree of pleasure when I caught him arguing with other passengers. I hadn’t seen him in a few years but last night he got on the train at 168th street. He looked thinner and older and he smelled. I heard him say something but couldn’t make out the words. A few people stood up and let him sit. He was a sad sight and I felt that I’d been petty, not in having an exchange with him one time, but for holding a grudge.