For, after all, how do we know that two and two make four? Or that the force of gravity works? Or that the past is unchangeable? If both the past and the external world exist only in the mind, and if the mind itself is controllable – what then?
George OrwellIt was intended that when Newspeak had been adopted once and for all and Oldspeak forgotten, a heretical thought...should be literally unthinkable, at least so far as thought is dependent on words.
George Orwell