Power of Physical Pain

 To me, one of the more major overarching points of Book 3, and Winston's general time in captivity, is the hold that physical pain and the ability to live in general has on humans. Winston is able to withstand so much psychological torture and brainwashing as a member of the outer party but is completely broken by torture. Specifically, when O'Brien forces Winston to tell him that 5 is 4 despite the fact that Winston knows it isn't. Everyone needs to live, and no one has superhuman pain tolerance. Even with extreme mental toughness, there are some things that keep every human grounded that can easily break us.

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