" She had once seen a heron flying across the estuary and trying, while it was on the wing, to swallow an eel which it had caught. The eel, in turn, was struggling to escape from the gullet of the heron and appeared a quarter, a half, or occasionally three-quarters of the way out. The indecision expressed by both creatures was pitiable. They had taken on too much. "
― Penelope Fitzgerald , The Bookshop