What is the ultimate goal of the human life? +

People say Aham Brahmasmi ~  I am God, I am Brahman. But when Brahman is, how can "I" remain? Only Brahman remains, not I.

Our body and the world are made out of single stuff. That single stuff is the Soul or Spirit or Consciousness. Realizing the Soul as the Self is Self-realization.

What is the nature of the Soul, the Self.

The nature of the Soul is formless, timeless and spaceless existence”. 

What is the ultimate goal of human life?

On the dualistic perspective: “The ultimate goal of the soul is to acquire Self-knowledge or Brahma Gnana or Atma Gnana. 

On the nondualistic perspective, there is no goal or no purpose in life.  Equanimity ~ observing the whole universe as the Soul, which is present in the form of the consciousness leads to Advaitic Self-awareness. 
Remember:~ 

The ‘I’ is present in the form of the mind. The mind is present in the form of the universe. The universe is present in the form of the form, time and space.  Without the form, time and space, there is no duality. The duality is not real from the standpoint of the Soul, the innermost Self.

The mind is present in the form of the form, time and space. Thus,  whatever belongs to form, time and space is a falsehood. Thus, the universe in which we exist as reality is a falsehood.   Thus, there is a need to know ‘what is what’ in order to realize the truth beyond the form, time and space.

The ‘I’ disappears as deep sleep, so what is the use of being attached to it? It is impermanent and illusory because ‘I’ is physical awareness. Physical awareness is not self-awareness. ‘I-less awareness is self-awareness.

There is really no ‘I’. The ‘I’ is present in the form of mind. And the mind is in the form of the universe. And the universe appears as waking or dream. The ‘I’ or mind or the universe or waking or dream disappears as deep sleep.  

Thus, one that appears as ‘I’ or mind or the universe or waking or dream is consciousness, and it disappears as deep sleep is also consciousness.  

In deep sleep, it is in its formless nondual true nature.  The one, which witnesses the coming and going of the three states, is also consciousness.   Thus, the witness and witnessed are one in essence.   

Thus, the universe is a  reality on the base of the individuality and the universe is unreal on the base of the soul (consciousness), which is the innermost self. The seeker gradually will grasp and realize the unreal nature of the universe or mind. Individuality is illusory because the Self is not an individual because the Self is formless, and it pervades everything and everywhere in all the three states. 

Remember:~

The objective world is not a creation of the mind because the objective world itself is the mind. Thus, without knowing ‘What is mind? ‘What is the substance of the mind and ‘What is the source of the mind?  it is difficult to understand, assimilate Self-knowledge or Brahma Gnana or Atma Gnana.  

The seeker has to know: whether the physical body and the world are within the mind or the mind is within the physical body? The mind, physical body, ego and the world are present only when the whole experience of the waking is present. And the mind is absent when the waking experience is absent. 

Thus, one has to conclude the mind as the whole waking experience. Thus, the mind appears as the waking experience (duality) and disappears as deep sleep (nonduality).  All your arguments are the truth only on the base of the ego, which is the false self, within the false experience (waking). The individual experiences within the waking are as real as a dream.

Suppose the same subject, if we are discussing in the dream and one asks me the same questions in the dream, then whatever he said in the dream becomes unreal, when the waking takes place. Whatever one says now, he is saying within the waking experience. The waking is unreal on the base of the formless witness, which is the Atman. Atman is in the form of consciousness.

Remember:~

How does one see various objects, scenes, and persons during dreams? If the dream is experienced without the physical body, then what is it that experiences the dream? Therefore, there must be a  witness (knower) of the dream world. This witness is the same witness that is witnessed this Waking experience also. Therefore, the waking experience and dream both are witnessed by one and only witnesses of which the seeker is not aware of. Since he considers the physical body (I) as the Self or witness and views and judges the world-view on the standpoint of the false self, within the false experience. The formless witness can exist with or without waking or dream. But the waking or the dream ceases to exist, without the formless witness (Soul).

The gross waking experience is merged into the mental experience in the sense that, when it is analyzed, it is found to exist inseparably in and as the mind alone. All "spiritual" planes are really mental: those who regard them as different or higher are deceiving themselves. 

The dream becomes unreal when the waking takes place; similarly, the waking becomes unreal when the wisdom dawns. Therefore, everything has to be grasped mentally, not argued on the intellectual point of view, which is limited to the false physical entity within the false experience.

The unreal is created out of real, and when one view and judges on the standpoint unreal (ego) then there is duality. When one is able to view and judge from the standpoint of the real (Soul) then there is only non -duality. Therefore, when the wisdom dawns, then there is neither duality nor nonduality, only reality.

All these confusions will go on until the man thinks, he is an individual and apart from the world, and the world existed prior to him and he is born in it afterward. Therefore, it is necessary to know the fact that,  the true self is not ego(you), but the true self is the Soul, and stop viewing and judging the world-view on the standpoint of the physical self (ego), and one has to view and judge on the true Self (Soul) to realize the fact that, the world along with the  man is an illusion. 

The formless substance from which the illusion is created is Atman. Thus, the  Atman is Brahman (ultimate reality). Thus,  no second thing exists on the standpoint of Atman or the consciousness as self. Thus,  there is neither experience nor the experiencer in non-dual reality,  but only the Self-awareness.:~Santthosh Kumaar