... Faress was a scientist and Dandrik was a science teacher. To Faress, a new door had opened, the first new door in eight hundred years. To Dandrik, it threatened invalidation of everything he had taught since the morning he had opened his first class. He could no longer say to his pupils, "You are here to learn from me." He would have to say, more humbly, "We are here to ... — Ministry of Disturbance • Henry Beam Piper