Yesterday I was in a frenzy to get the house clean, the girls ready, and our gear set for a business trip in the city. The girls were remarkably chill, abandoning their tendency toward tears or anxiety about my leaving. Still, it was nerve-wracking, the ever-present, “Will I be good enough?” rattling around in my head. The strangest thing happened, each time I thought there would be an obstacle—the weather, running late, the weather, texts of a tummy bug at home, the weather—the obstacle didn’t triumph. Three minutes to spare for the train. An extra pair of gloves. A text that everyone went to sleep. A warm bench seat and a wide-screen playing the SNL 40th show. This morning my nerves were operating at…