Orwell shows that constant vigilance puts an end to freedom and causes strong manipulation.
Explanation:
In "1984" Orwell warns us about the danger of political totalitarianism and the complete destruction of freedom and information, promoting a limitation and intense manipulation that makes all citizens live the wills and government information litigated, even unable to think and maintain your own opinions, wishes and actions.
If you understand the historical perspective then you understand the cultural, social, intellectual, and emotional settings of the text. This can help you better understand why the person is feeling what he/she is feeling and it can help you understand why the character's do what they do.
