doublethink

"to know and to not 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 forget, whatever it was necessary to forget then draw it back into memory at the moment when it was needed and then promptly forget it again"

"to apply the same process to the process itself, ultimate subtlety"

"consciously induce unconsciousness and then once again to become
unconscious of the act of hypnosis you had just performed"

"to force oneself to be happy of despair and to then be happy of the act of
artificial happiness"