According to the teaching of Upanishads, Reality is not:

1. What you have been told it is.
2. What you think it is.
3. What you believe it to be.
4. What you want it to be.
5. What you think it should be.

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Well, then, what is It?

The only way to find out is to look and see for yourself, not to believe.

"यन्मनसा न मनुते येनाहुर्मनो मतम् ।
तदेव ब्रह्म त्वं विद्धि नेदं यदिदमुपासते ॥" ~ केनोपनिषत्

"जद्यपि ब्रह्म अखंड अनंता। अनुभव गम्य भजहिं जेहि संता॥"~ श्रीरामचरितमानस
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Not as some objective truth separate from yourself but as stated in the following mantra of the Kathopanishad.

"न संदृशे तिष्ठति रूपमस्य
न चक्षुषा पश्यति कश्चनैनम् ।
हृदा मनीषा मनसाऽभिक्लृप्तो
य एतद्विदुरमृतास्ते भवन्ति ॥"~कठोपनिषत्(२।३।९) https://twitter.com/Coffeemaniac6/status/1283048708695904256?s=20

(Advait) Vedanta is more "scientific" than is the materialistic premise of an objective, external world because it is based on the immediate and direct experience of our consciousness, rather than on a metaphysical concept.

The concept of an external world is not primary, but is a mental construct based on sense impressions and therefore, like all concepts, it must be taught and learned, while the self-evident experience of consciousness is preconceptual and cannot be denied.

In physics, objective reality is defined as that which exists whether or not it is being observed. A fundamental problem with this definition is that it can never be verified by observation because all of our observations, without exception, are purely subjective and1+
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can never go beyond the mind.

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Concepts in quantum theory are usually conceived within the context of time and space, so it is in principle impossible to use such quantum concepts in a realm in which space-time is absent.
#QuantumBrainAndConsciousness
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The transcendental realm is hypothesized to contain the wavefunction, yet the wavefunction as normally conceived is a function of time and space, which are absent in the transcendental realm and in fact do not appear "until" wavefunction collapse.
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Thus, the concepts of wavefunctions and wavefunction collapse in the transcendental realm are meaningless.
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Because most scientists of all types are mentally wedded to a belief in an external reality, they are unable to see an alternative picture. In particular, they are unable to see that Consciousness, rather than external reality, is the fundamental Reality.
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Thus, they persist in attempting (and in failing) to create an objective theory of Consciousness.
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When the contents of Awareness try to objectify Awareness, it is like a puppet trying to "puppetize" the puppet master, a picture on a movie screen trying to "pictureize" the actors,1+
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a shadow striving to "shadowize" the object that is casting it, or humans trying to "humanize" God.
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The problem of trying to create an objective theory of subjective experience has been labeled the "hard problem" of consciousness by David Chalmers (see Scientific American, Dec. 1995, p. 80).
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The so-called "easy problem" is to explain the functioning of the brain in terms of objective concepts. In fact, there is no hard problem for those who are aware that they are aware.
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