Heroism is not possible, at all. The dictatorship of the Party has produced masses of people who all look the same and repeat the same things over and over again; their only concern is to survive the hunger and cold while toiling day in day out under the all-encompassing gaze of Big Brother. Winston does not rebel to be a hero: he wants to focus on the sense of being human, which he believes is disappearing around him. Julia does that too, in her own peculiar way: they think they can hide from the eyes of Big Brother, they believe they can escape their senseless routines by furtively creeping out of their lives and into the cracks of freedom left open by what they think is a forgetful Party. These cracks are revealed later to be traps laid there for them, and the impossible dream of redemption is crushed by the torturer, O'Brien. Very interestingly, the Party does not kill them; they do not want to create martyrs. The objective of torture is to break the bond of love and complicity between them ("Do it to Julia") and to make Winston love Big Brother. The final scene is a harrowing tale of denial and crushed hopes: how can we look for heroes here when the protagonist is now a subservient member of the Party he tried to cheat at the beginning?