Quotes from book
1984

Nineteen Eighty-Four: A Novel, often published as 1984, is a dystopian novel by English novelist George Orwell. It was published on 8 June 1949 by Secker & Warburg as Orwell's ninth and final book completed in his lifetime. The story was mostly written at Barnhill, a farmhouse on the Scottish island of Jura, at times while Orwell suffered from severe tuberculosis. Thematically, Nineteen Eighty-Four centres on the consequences of government over-reach, totalitarianism, mass surveillance, and repressive regimentation of all persons and behaviours within society.The story takes place in an imagined future, the year 1984, when much of the world has fallen victim to perpetual war, omnipresent government surveillance, historical negationism, and propaganda. Great Britain, known as Airstrip One, has become a province of a superstate named Oceania that is ruled by the Party who employ the Thought Police to persecute individuality and independent thinking. Big Brother, the leader of the Party, enjoys an intense cult of personality despite the fact that he may not exist. The protagonist, Winston Smith, is a diligent and skillful rank-and-file worker and Party member who secretly hates the Party and dreams of rebellion. He enters a forbidden relationship with a co-worker, Julia.

“If you want a vision of the future, imagine a boot stamping on a human face--forever.”
Variant: If you want a picture of the future, imagine a boot stamping on a human face—for ever.
Source: 1984

“The past is whatever the records and the memories agree upon.”
Source: 1984

“A lunatic is just a minority of one.”
Variant: Perhaps a lunatic was simply a minority of one.
Source: 1984

“To enforce the lies of the present, it is necessary to erase the truths of the past.”
Attributed to Orwell by Keith Olbermann on MSNBC (27 September 2006), this seems to be a paraphrase of some of the statements in Nineteen Eighty-Four.
Misattributed
Source: 1984

“The Revolution will be complete when the language is perfect.”
Source: 1984