The morphological evolution of various species is going on inexorably. How long can it take for this human frame to evolve to its pinnacle? Perhaps millions of years, perhaps less. My body meanwhile can only age and decay before it can witness the fully evolved human frame. As far as the soul is concerned, it is already pure and eternal in nature. There is nothing lacking with this life force. So what actually evolves on a grand scale is truly our consciousness.
The purpose of all spiritual practices and especially the practices of meditation is to lead this available consciousness to soar higher and higher in the infinite sky of superconsciousness and to facilitate its plunging into the deepest ocean of subconsciousness.
Having played with the toy of consciousness at various levels, now we start exploring what lies behind that which supports consciousness.
For further reading on the Evolution of Consciousness, please visit:
http://www.heartfulnessmagazine.com/the-evolution-of-consciousness-part-1/.