How does Big Brother and the Party's abuse of power affect Winston?Please be as detailed as possible!
To me, there are two ways that the abuse of power affects Winston. First, it makes him unhappy with his life and with his society. Second, it destroys him and his humanity.
In the first part of the book (up until he is arrested), Winston is showing how the Party's abuse of power has made him feel that his life and society are no good. He feels like the abuse takes away his human feelings and his human memories. It simply makes him into a machine controlled by the Party. He fights back against this with his diary and with Julia.
After he is arrested, the Party's abuse of power destroys Winston. He is tortured to the point where he really believes things that he knows are not true. He is tortured to the point where his will breaks and he loves Big Brother.
In the beginning of the story, it drives him to find this journal and to start filling it with his thoughts. He finds at times that he is even writing things unconsciously or that he repeats certain phrases, often ringing with hate and disgust at the party and at Big Brother. It fills him up with some kind of inner rage that compels him to take such great pleasure in his sexual trysts with Julia and that they are an act against the party in some way.
The abuse of power lead him to O'Brien and to further attempts to somehow fight back against this overwhelming force of Big Brother and the party. They lead as well to his eventual demise and empty existence drinking Victory Gin once they've shown him that he is nothing but selfish.