Doublethink means the power of holding two contradictory beliefs in one's mind simultaneously, and accepting both of them.

When you make love you're using up energy; and afterwards you feel happy and don't give a damn for anything. They can't bear you to feel like that. They want you to be bursting with energy all the time. All this marching up and down and cheering and waving flags is simply sex gone sour. If you're happy inside yourself, why should you get excited about Big Brother and the Three-Year Plans and the Two Minutes Hate and all the rest of their bloody rot?

[...] you can get anything in this world if you genuinely don't want it.

There is no test of literary merit except survival, which is itself an index to majority opinion.

All the war-propaganda, all the screaming and lies and hatred, comes invariably from people who are not fighting.

Some things ARE true, even though the party says they are true.

But the proles, if only they could somehow become conscious of their own strength, would have no need to conspire. They needed only to rise up and shake themselves like a horse shaking off flies. If they chose they could blow the Party to pieces tomorrow morning. Surely sooner or later it must occur to them to do it? And yet --!