“As I make hundreds of small choices throughout the day, I’m building a life—but at one and the same time, I’m closing off the possibility of countless others, forever. (The original Latin word for “decide,” decidere, means “to cut off,” as in slicing away alternatives; it’s a close cousin of words like “homicide” and “suicide.”) Any finite life—even the best one you could possibly imagine—is therefore a matter of ceaselessly waving goodbye to possibility.”