SOUL VS. ATMAN

There is an important distinction to be made between the Atman and a soul. 

The term "soul" implies an object possessed.  "I have a soul."  Moreover, it is something unique to the individual.  My soul cannot be your soul, and vice versa.

The Atman, by contrast, is not an object owned or something exclusive to the individual.  Your Atman not only can be but is my Atman. 

There is only one Atman, and only one Brahman, of which the Atman is the subjective aspect.

The implications of this are profound in regard to Vedantic liberation.  Liberation in Vedanta is not the "saving" of a personal soul, as in Christianity, but the awakening of the one Atman we all share.

However, just because we all have the one Atman does not mean that its awakening in you will awaken it in me at same time.  We are different journeys.