In 1984 how does Winston’s work at the Ministry of Truth create inner conflict, and how does that affect the plot?

Early on the narrator tells us that Winston finds it “terrifying” that something historical can be said to never have happened. He cannot forget the photograph he once saw that contradicted Party propaganda about some of its former leaders. Yet his job at the Ministry of Truth is to revise old documents to match the Party’s current policy. For his job Winston must sometimes invent people and situations that never existed to support those policies. But, in his personal life, he feels the repercussions of missing history—he can’t even remember his family well enough to trust that there was once real love in his life. Winston’s personal diary is an effort to capture events in a true record that cannot be changed. Winston knows that history is not modifiable; he sets out to prove it on his own, and yet every day he participates in the fabrication or revision of history. This conflict regarding the ability to make up facts in his job and the opposing desire to keep the truth intact shows that there is a small part of Winston that can be reached by the Party, even though he opposes its control over the people. This is the part of Winston that will be crushed at the novel’s end.