In the rooms that Winston goes through, including 101, he is starved and beaten etc. But is O'Brien with them? He says that "They got me a long time ago" or something to that extent, does this mean he is thought police. That would explain the sudden change in the apartments safety when he tells of it. On the other hand was O'Brien actually captured? If so that really doesn't explain his cryptic language. Winston is starved, watches others beaten, and even meets a woman who may be his mother(doubtful). When he reaches room 101 he confesses of things he has not even done to incriminate others. But is this torture going to end because of it. This whole seen is extremely fascinating, but while Winston is tortured Orwell tortures the reader with anticipation, don't you think?