“Maybe there wasn't, after all, a clear motivation for any of the things that people did. Maybe they just did them for no reason at all or because of stupidity or selfishness or cowardice or anger or for reasons that made no rational sense - because the clouds happened to be a particularly gloomy shade of gray that day, because the barking of an old dog chained to a sycamore tree just happened to sound exactly like the crunch of soldiers' boots on gravel or the hum of bees like an engine in the head driving you mad.”