He thought of the telescreen with its never-sleeping ear. They could spy upon you night and day, but if you kept your head you could still outwit them. With all their cleverness they had never mastered the secret of finding out what another human being was thinking. Perhaps that was less true when you were actually in their hands. One did not know what happened inside the Ministry of Love, but it was possible to guess: tortures, drugs, delicate instruments that registered your nervous reactions, gradual wearing-down by sleeplessness and solitude and persistent questioning. Facts, at any rate, could not be kept hidden. They could be tracked down by enquiry, they could be squeezed out of you by torture. But if the object was not to stay alive but to stay human, what difference did it ultimately make? They could not alter your feelings: for that matter you could not alter them yourself, even if you wanted to. They could lay bare in the utmost detail everything that you had done or said or thought; but the inner heart, whose workings were mysterious even to yourself, remained impregnable.