Science now says: Consciousness requires the joint operation of the brain, body, and world.+

When the ‘Self’, not you but the ‘Self ‘is the Soul, which is present in the form of the consciousness, then the body (brain) and the world are merely an illusion. That is why the truth- realization is impossible without a perfect understanding of ‘what is what.

When the ‘Self’ is not the physical body then it is erroneous to judge and reason and conclude the truth on the base of ego, which is the false Self (you) within the false experience (waking) because it leads to an imaginary version of the hallucinated truth.

Even science:~

Why You Are Not Your Brain, and Other Lessons from the Biology of Consciousness

By: Alva Noë. Hill and Wang, 2009

Alva No, a University of California, Berkeley, philosopher, and cognitive scientist, argues that after decades of a concerted effort on the part of neuroscientists, psychologists, and philosophers "only one proposition about how the brain makes us conscious ... has emerged unchallenged: we don't have a clue." The reason we have been unable to explain the neural basis of consciousness, he says, is that it does not take place in the brain. Consciousness is not something that happens inside us but something we achieve it is more like dancing than it is like the digestive process. To understand consciousness the fact that we think and feel and that the world shows up for us we need to look at a larger system of which the brain is only one element. Consciousness requires the joint operation of the brain, body, and world. "You are not your brain. The brain, rather, is part of what you are."

Consciousness is the cause of the universe and it itself is uncaused. The universe is nothing but consciousness. Modern science has yet to discover consciousness is the cause of the universe, which was discovered and declared by Sage Sankara 1200 years back.

Sage Sankara says:~ Atman is Brahman. The Atman alone is real. He has declared this Advaitic truth, which is the ultimate truth to the whole world, many centuries back.

Thus, the Atman which is present in the form of the consciousness is real and eternal, the world in which we exist is merely an illusion.  

Until and unless scientists become aware of the fact that, the Self is not physical their experiments will not yield any fruit. The experiment on the physical body and trying to find the truth is like trying to drain the ocean drop by drop.

Until scientists realize the fact that, the gross world is merged into the mental experience in the sense that when it is analyzed, it is found to exist inseparably in and as consciousness alone.

All "spiritual" planes are really mental: those who regard them as different or higher are taking the physical body and the world as reality.

Scientists take birth, life, and death as a reality, their scientific inventions are based on physical awareness, and they will not be able to go deeper into this subject because they cannot cross the threshold of the illusory form, time, and space.

Modern equipment can investigate objects within the physical existence, but it is impossible to investigate the physical existence as a whole i.e. man and the world together. The whole cannot be investigated with laboratory conditions. Only through deeper thinking through inquiry, analysis, and reasoning, the whole has to be investigated.

One has to reach beyond the physical existence, mentally, and discovers, grasps the fact that, the physical existence is merely an illusion created out of single stuff; otherwise he will remain the conviction believing the duality is a reality. : ~Santthosh Kumaar