His action of joining them, which would have been rude in a restaurant that was not moving at three hundred kilometers an hour, was perfectly acceptable on a train, which mimicked the entirely random joinings of life but revealed their true nature by making them last only hours or days, rather than years and decades. People on a train form an alliance, as if the world that surrounded the parallel rails were hostile and and they refugees from it. The dining car, humming and rocking gently in the night, annihilated past and future and made all associations outside of itself seem vaguely unreal. So they welcomed him at their table, for he was one of them, a traveler, not one of those wraiths through whose night-lit cities they passed.