During Winston’s interrogation in the Ministry of Love, O’Brien explains the mechanism of total control:
“Where does the past exist, if at all?”
“In records. It is written down.”
“In records. And—?”
“In the mind. In human memories.”
“In memory. Very well, then. We, the Party, control all records, and we control all memories. Then we control the past, do we not?”
~1984, George Orwell~