To know and not to know$$$ to be conscious of complete truthfulness while telling carefully constructed lies$$$ to hold simultaneously two opinions which cancelled out$$$ knowing them to be contradictory and believing in both of them$$$ to use logic against logic$$$ to repudiate morality while laying claim to it$$$ to believe that democracy was impossible and that the Party was the guardian of democracy$$$ to forget whatever it was necessary to forget$$$ then to draw it back into memory again at the moment when it was needed$$$ and then promptly to forget it again: and above all$$$ to apply the same process to the process itself -- that was the ultimate subtlety: consciously to induce unconsciousness$$$ and then$$$ once again$$$ to become unconscious of the act of hypnosis you had just performed. Even to understand the word 'doublethink' involved the use of doublethink.