"Thieving was not a sheer absurdity. It was a form of human industry, perverse indeed, but still an industry exercised in an industrious world; it was work undertaken for the same reason as the work in potteries, in coal mines, in fields, in tool-grinding shops. It was labour, whose practical difference from the other forms of labour consisted in the nature of its risk, which did not lie in ankylosis, or lead poisoning, or fire-damp, or gritty dust, but in what may be briefly defined in its own special phraseology as "Seven years' hard". Chief Inspector Heat was, of course, not insensible to the gravity of moral differences. But neither were the thieves he had been looking after. They submitted to the severe sanction of a morality familiar to Chief Inspector Heat with a certain resignation. They were his fellow citizens gone wrong because of imperfect education, Chief Inspector Heat believed; but allowing for that difference, he could understand the mind of a burglar, because, as a matter of fact, the mind and the instincts of a burglar are of the same kind as the mind and the instincts of a police officer. Both recognize the same conventions, and have a working knowledge of each other's methods and of the routine of their respective trades. They understand each other, which is advantageous to both, and establishes a sort of amenity in their relations. Products of the same machine, one classed as useful and the other as noxious, they take the machine for granted in different ways, but with a seriousness essentially the same. The mind of Chief Inspector Heat was inaccessible to ideas of revolt. But his thieves were not rebels. His bodily vigour, his cool, inflexible manner, his courage, and his fairness, had secured for him much respect and some adulation in the sphere of his early successes. He had felt himself revered and admired. And Chief Inspector Heat, arrested within six paces of the anarchist nicknamed the Professor, gave a thought of regret to the world of thieves--sane, without morbid ideals, working by routine, respectful of constituted authorities, free from all taint of hate and despair."