As I have already said, the belief that one's own view of reality is the only reality is the most dangerous or all delusions. It becomes still more dangerous if it is coupled with the missionary zeal to enlighten the rest of the world, whether the rest of the world wishes to be enlightened or not. To refuse to embrace wholeheartedly a particular definition of reality, to dare to see the world differently can become a "think crime" in a truly Orwellian sense as we get steadily closer to 1984.
Paul Watzlawick (1977). “How real is real?: Confusion, disinformation, communication”, Vintage