Ashtavakra Gita: ~ The universe rises from the Self like bubbles from the sea.+

The look of an object will depend upon the medium through which the observer views it. In fact, our mental and intellectual conditions determine the object (three states), observed and experienced.  The commoner viewing the world will see differently from a Gnani viewing the same world. Each one interprets the world that they see in terms of their existing knowledge. The commoner sees everything based on the ego, therefore, he sees the world in which he exists as a reality, whereas a Gnani sees everything as consciousness and he is fully aware of the fact that, there is no second thing that exists other than the Soul or consciousness (subject). 

Thus, all objective observation has to be bifurcated to realize the ultimate truth, which is hidden by the illusory form, time, and space.

Only from the dualistic perspective, do the changes take place. From the non-dualistic perspective, there are no changes.  

Those who believe in the dualistic world as really feel that knowledge changes from time to time but they must realize their knowledge is limited to form, time, and space whereas Self-knowledge is the knowledge of the beyond form, time, and space.

Change is possible only in ignorance. Ignorance is the cause of experiencing the world which exists as a reality.   Consciousness is the cause of the world in which we exist and it itself is uncaused.

The world in which we exist is dependent on the consciousness for its existence but the Soul, which is present in the form of consciousness, is independent.  From the standpoint of the Soul, the Self, the world in which we exist is merely an illusion.

Remember:~

Only within the illusion do the changes take place, the illusory changes within the illusion are bound to be an illusion. In reality, consciousness alone is real and eternal. Thus, the knowledge of the eternal will be always eternal. The intellectual knowledge based on form, time, and space is bound to change from time to time as science progresses in its dualistic inventions.     

Consciousness is ever-changeless because it is a formless, timeless, and spaceless existence.  Consciousness permeates everything and everywhere in all three states. Consciousness illumines the whole universe that includes the Sun, Moon, and the whole galaxy.

Consciousness pervades the entire Universe outwardly and shines of itself, as the fire that permeates a red-hot iron ball both inwardly and outwardly shines of itself. There exists nothing that is not consciousness.

People perform all their actions in and through consciousness, but they are ignorant of the Soul, the innermost Self. The Soul is present in the form of consciousness. From the standpoint of the Soul, the innermost Self, the universe in which we exist is merely an illusion. 

From illusion springs separation wherein the experience of birth, life, death, and the world have roots. 

Ashtavakra Gita: ~ The universe rises from the Self like bubbles from the sea. Thus, know the Self to be ‘One’ and in this way enter into the state of dissolution."

For the Gnani who realizes everything as consciousness, what is there to meditate or not to meditate, what to speak or not to speak, what to do or not to do? Those who give up the highest and purest Brahmic consciousness live in vain and though human, are like beasts. Having turned the visible into the invisible, one should realize everything to be consciousness itself.

A  Gnani always dwells in non-dual awareness. The ever-existent Soul or consciousness shining within the three states can be realized only through Self -knowledge or Brahma Gnana or Atma Gnana.  

The Self indeed is the Soul, which is present in the form of consciousness, not the phenomenal universe which is present in the form of the mind. :~Santthosh Kumaar