Why do you think Orwell includes the last passage in chapter 1 about pain?

Which book part are you referring to? 1984 has three parts to the book.

Oh sorry! I meant Chapter One of Part Three. It's on the last page of the chapter. Thanks so much for all the help! :)

"The guard was laughing at his contortions. One question at any rate was answered. Never, for any reason on earth, could you wish for an increase of pain. Of pain you could wish only one thing: that it should stop. Nothing in the world was so bad as physical pain. In the face of pain there are no heroes, no heroes, he thought over and over as he writhed on the floor, clutching uselessly at his disabled left arm.