" He came forward. “Mr. Trask,” he said. “My name is Martin Carroll. I expect shortly to receive orders to obtain from you, by any means, a full account of your activities.”
Marin studied the man’s face. He was remembering Carroll. He had seen him once or twice with Slater, he recalled. Carroll was a type. Strongly dedicated to duty, he was a dangerous adversary because he had no doubt about the rightness of the work he did.
Marin had only a passing interest in the man. He knew his own needs in what was developing here. Only hate in all its violence could maintain the muscles and nerves of any living creature against torture. He had no time for kind thoughts or for reason—except at the far edge of his mind. "

― A.E. van Vogt , The Mind Cage