Extract from George Orwell collection of essays - "On Truth':
A party member is required, not only, to have the right opinions, but the right instincts. Many of the beliefs and attitudes demanded of him.......could not be stated without laying bare the contradictions inherent in Ingsoc ( prevailing orthodoxy). If he is a person naturally orthodox - a goodthinker -he will in all circumstances know, without taking thought, what is the true belief or the desirable emotion. But in any case elaborate mental training....makes him unwilling and unable to think too deeply on any subject whatever.
A party member is expected to have no private emotions, and no respite from enthusiasm. He is supposed to live in a continuous frenzy of hatred of foreign enemies and internal traitors. Speculations which might possibly induce a sceptical or rebellious attitude are killed in advance by his early acquired inner discipline. The first and simplest stage, which can be taught even to young children, is called Newspeak.
Crimestop means the faculty of stopping short, as though by instinct, at the threshold of any dangerous thought.....failing to perceive logical errors, of misunderstanding the simplest arguments if they are inimical to Ingsoc ( prevailing orthodoxy), and of being bored or repelled by any train of thought which is capable of leading in a heretical direction. Crimestop, in short, means protective stupidity..........Blackwhite...when applied to an opponent, means the habit of impudently claiming that black is white, in contradiction of the plain facts. Applied to party discipline it means a loyal willingness to say that black is white when party discipline demands this. But it means also the ability to believe that black is white, and more, to know that black is white, and to forget that one has ever believed the contrary.