When you think of it, really there are four fundamental questions of life. You've asked them, I've asked them, every thinking person asks them. They boil down to this; origin, meaning, morality and destiny. 'How did I come into being? What brings life meaning? How do I know right from wrong? Where am I headed after I die?'
In a way, the world-view of the Party imposed itself most successfully on people incapable of understanding it. They could be made to accept the most flagrant violations of reality, because they never fully grasped the enormity of what was demanded of them, and were not sufficiently interested in public events to notice what was happening. . They simply swallowed everything, and what they swallowed did them no harm, because it left no residue behind, just as a grain of corn will pass undigested through the body of a bird.