A thematic look at 1984
"But always- do not forget this, Winston- always there will be the intoxication of power, constantly increasing and constantly growing subtler. Always, at every moment, there will be the thrill of victory, the sensation of trampling on an enemy who is helpless. If you want a picture of the future, imagine a boot stamping on a human face- forever." (3.3.34, O'Brien) This passage explains that the party only wants to maintain power over resistance and for no other reason. They want power because the thrill of winning against the people for eternity.