"Banish this calamity, spare the sun!" (6.6)
Arthur is pretty rattled by the eclipse that Hank is passing off as magic. This moment also puts Hank in a bind: he's making use of the very fear that he wants to destroy, which may be one of the things that leads to his downfall. He has to perpetrate belief in the supernatural if he wants to end it, a bind that's bound to create problems down the road.