But Gregg took little notice of the interruption. "Once you have grasped this idea of a new sort of relativity," he continued, "once you have realised that the Clockwork man behaves in accordance with laws quite different to our own, you can proceed to find some basis for such a phenomenon. The Clockwork man behaves in a certain manner; therefore there must be some cause, however improbable it may appear to us, to account for such behaviour. Now, what is the cause of ordinary human action? It is something equally unaccountable. We can explain it in terms of a system, of a series of processes, but we do not really know what is the secret spring upon which the human animal moves. We can describe the machinery of the human body, but we do not really know what life is, or what is the real nature of the force that produces our actions. So far we know as much about the Clockwork man as we do about ourselves. The difference is confined to processes." "All this is obvious," said the Doctor, "I have seen enough to convince me of that." "Precisely. And because you have seen more than I have you are less able to understand the matter than I am. You cannot see the wood for the trees. Again, you were frightened out of your life. Your scientific instincts were stampeded. You saw only a hideous malformation, a neural freak, a preposterous human machine. It was inconceivable that you should have been able to think clearly under the circumstances. Consider the matter in the sober aftermath of reason, and you must agree with me that it is really not more extraordinary that a man should function by mechanical means than that he should function at all." "I don't agree," retorted the Doctor, with unexpected sharpness. "I think it is far more amazing that a human being should function as he does, than that he should be made to function differently by mechanical means. The Clockwork man is no more wonderful, in that sense, than you or I. He is simply different--damnably different." Gregg laughed softly. "Well, that is only another way of saying what I have already said. You seem to regard the Clockwork man as a sort of offence; he upsets your sense of decency. To me he is profoundly interesting. I accept him, and all that his curious constitution implies. Think of the triumph for the human brain. For man, thanks to this stupendous invention of the clock, has actually enlarged the universe." "A multiform world," murmured the Doctor, recollecting the Clockwork man's description, "a world of many dimensions." "Yes," echoed Gregg enthusiastically, "a multiform world. A world in which man moves as he will, grows as he will, behaves in every way exactly as he wills. A world set free! Think of what it means!"