From "1984" the film:

[reads from Goldstein's book] "In accordance to the principles of doublethink, it does not matter if the war is not real, or when it is, that victory is not possible. The war is not meant to be won. It is meant to be continuous. The essential act of modern warfare is the destruction of the produce of human labour. A hierarchical society is only possible on the basis of poverty and ignorance. In principle, the war effort is always planned to keep society on the brink of starvation. The war is waged by the ruling group against its own subjects, and its object is not victory over Eurasia or Eastasia, but to keep the very structure of society intact." [notices Julia is asleep] Julia? Are you awake? There is truth, and there is untruth. To be in a minority of one doesn't make you mad. Julia, my love, I understand how, but I don't understand why.