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“Tell me," Wittgenstein's asked a friend, "why do people always say, it was natural for man to assume that the sun went round the earth rather than that the earth was rotating?" His friend replied, "Well, obviously because it just looks as though the Sun is going round the Earth." Wittgenstein replied, "Well, what would it have looked like if it had looked as though the Earth was rotating?”
― Ludwig Wittgenstein

“Developing a consciousness culture has nothing to do with establishing a religion or a particular political agenda. On the contrary, a true consciousness culture will always be subversive, by encouraging individuals to take responsibility for their own lives.”
― Thomas Metzinger

“However, questions arise. Are there people who aren't naive realists, or special situations in which naive realism disappears? My theory—the self-model theory of subjectivity—predicts that as soon as a conscious representation becomes opaque (that is, as soon as we experience it as a representation), we lose naive realism. Consciousness without naive realism does exist. This happens whenever, with the help of other, second-order representations, we become aware of the construction process—of all the ambiguities and dynamical stages preceding the stable state that emerges at the end. When the window is dirty or cracked, we immediately realize that conscious perception is only an interface, and we become aware of the medium itself. We doubt that our sensory organs are working properly. We doubt the existence of whatever it is we are seeing or feeling, and we realize that the medium itself is fallible. In short, if the book in your hands lost its transparency, you would experience it as a state of your mind rather than as an element of the outside world. You would immediately doubt its independent existence. It would be more like a book-thought than a book-perception. Precisely this happens in various situations—for example, In visual hallucinations during which the patient is aware of hallucinating, or in ordinary optical illusions when we suddenly become aware that we are not in immediate contact with reality. Normally, such experiences make us think something is wrong with our eyes. If you could consciously experience earlier processing stages of the representation of the book In your hands, the image would probably become unstable and ambiguous; it would start to breathe and move slightly. Its surface would become iridescent, shining in different colors at the same time. Immediately you would ask yourself whether this could be a dream, whether there was something wrong with your eyes, whether someone had mixed a potent hallucinogen into your drink. A segment of the wall of the Ego Tunnel would have lost its transparency, and the self-constructed nature of the overall flow of experience would dawn on you. In a nonconceptual and entirely nontheoretical way, you would suddenly gain a deeper understanding of the fact that this world, at this very moment, only appears to you.”
― Thomas Metzinger, The Ego Tunnel: The Science of the Mind and the Myth of the Self

“The biological imperative to live—indeed, live forever—was burned into our brains, into our emotional self-model,
over the course of millennia. But our brand-new cognitive self-models
tell us that all attempts to realize this imperative will ultimately be futile.
Mortality, for us, is not only an objective fact but a subjective chasm, an open wound in our phenomenal self-model. We have a deep, inbuilt existential conflict, and we seem to be the first creatures on this planet to
experience it consciously.”
― Thomas Metzinger, The Ego Tunnel: The Science of the Mind and the Myth of the Self