Three times a week after school I go visit my dad. When I enter the hospital room where he has lain in a coma since his accident, my eyes often wander to the lone golf ball my mom placed at his bedside. Just six months ago, my father was driving a golf cart across the street that bisects the local golf course when he was hit by a car. He suffered severe brain injury, and the doctors have ruled out any possibility of him waking up again. When I look at him lying in bed, frail but peaceful as if he were asleep, it's hard not to dwell on the "what ifs": what if he hadn't played golf that day? What if he hadn't been behind the fence when the black Camry plowed into it? What if I still had the chance to ask all those questions that choke me up when I see him in the hospital? I can't pretend that I have developed enough distance from the event to draw conclusions about life, but I am already beginning to see myself in very different terms.…