Sept. 11 delivered both a shock and a surprisethe attack, and our response to itand we can argue forever over which mattered more. There has been so much talk of the goodness that erupted that day that we forget how unprepared we were for it. We did not expect much from a generation that had spent its middle age examining all the ways it failed to measure up to the one that had come beforeall fat, no muscle, less a beacon to the world than a bully, drunk on blessings taken for granted.