The doctrine that O'Brien proclaims to Winston in 1984 plays a major role in maintaining the system of oligarchic collectivsm and in Winston's fate. Winston was a character who had no choice but to be secretive. Everything he did or thought was always subject to be reviewed as political rebellion by the Party. Winston's diary entries was his only sacred expression of being free. His love for Julia was his only hope for surviving that lifestyle. O'Brien's doctrine was so important because O'Brien pretty much knew that what he was saying to Winston was nothing but music to Winston's ears. It was everything that Winston had ever hoped for and dreamed of being. It was the only tool that could maintain Winston's sanity.
O' Brien knew exactly just how desperate Winston was for freedom and how much Winston hayed the Party. He knew that Winston would be a supporter of anyone who even looked like thay were against the Party. Winston was a very confused character. Being as though his life was not his own, and he was forced to speak a language that deleted his actual emotions, it was hard for him to to be able to judge who was for him or against him. This is why his Diary was basically his best friend. Therefore, O'Brien's cleverness and conceit is what caused Winston's fate. Winston's only hope throughout the story was to recall things that use to happen in the past with the things that were happening now. It seems as if us, the readers and O'Brien were the only ones who had actual knowledge of Winston's naive ways. Therefore, the readers and O'Brien were able to conclude just how Winston would react to his fate.