Man including the world = mind.

The mind is an experience not an experiencer. Man including the world = mind. Whatever is within the mind, that is, the person and his world, bound to be an experience.  Mind is present in the form of universe. The universe appears as waking or dream (duality) and diapers as deep sleep (nonduality). The one which is aware of the coming and going of the three states is neither the waking entity nor the dream entity but the formless soul, which is present in the form of consciousness.  When the soul becomes aware of its formless non-dual true nature in the midst of duality it is called self –awareness. It is foolish to limit the consciousness only to duality because the consciousness pervades all the three states 

 The formless witness of the mind has to be traced. If there is no mind, then there is no waking or dream experience. Therefore it is evident that, the witness of the mind can remain with or without, the three states. For illustration, in deep sleep, there is no mind, thus there is no waking or dream. In waking it knows about the dream and deep sleep experience.  Thus one which knows the coming and going of the three states is always alert.

When the ultimate truth is rightly known and one attains eternal life thereby. Through soul, the innermost self he gains strength and through its knowledge immortality.

 Not by intellectual   speculation but only by an awakening to the reality of his true existence he gets soul-centric vision. Soul, the innermost self's nature is like state of deep sleep. If  the soul wakes up in its formless non-dual true nature through wisdom in the midst of duality  then there is neither the waking nor the dream.