AS TIME GOES BY Nearing the end, Old asks himself, "Does my life ultimately have any importance in any universal scheme? Am I just taking up space? Have I wasted the time given me? What effect have I had on others? Have I unknowingly, worse, knowingly, hurt others in some fashion? What's my worth? These are playful existential questions with no pertinent answers for me. So I'm putting down my cane and picking up my pen. I'm going to sift through the...