The totality of being is shown to be repudiated in 1984. The vision that Orwell renders is a world where there is no sense of being whole. Consciousness is fragmented, and never quite a coherent vision of unity.
This is seen in Winston's life. He is not fully an appropriated "cog in the machine" in the novel's exposition. There are parts of his being that actively embrace a world outside of Big Brother. His affair with Julia is probably the closest thing to being a "completed" person he experiences, ironic given how both of them carried their affair with the understanding that what they were doing was deemed inappropriate by the Party.
Even when Winston is reeducated, he is not really a completely changed person, as evident from the small doodles he does at the end while he is sitting at the Chestnut Tree Cafe as well as his closing memory of his mother playing Snakes and Ladders with him. These "false memories" can be pushed aside, but they will always be with him, serving as Orwell's reminders that totality is impossible. Winston might have been "changed." Yet, there is still a part of his consciousness, a small recess or corner of his being, that remains untouched by Big Brother and the Party. In this construction, Orwell suggests that the individual will never fully be "complete" in the modern setting.
For Orwell, individuals must recognize that the best they can do is represent a force of transformation and change in a world that seeks to make them an appropriated piece of totality. Orwell does not accept totality in any form, rather opting for individual voice and authenticity. The vision of the world rendered in 1984 is bleak precisely because it seeks to establish a totalizing presence. Orwell's admonition to the reader is to reject any order that seeks to offer totality for it is impossible in the modern setting in both socio-political and psychological notions of the good.