The question is if this is all, the last limit of material evolution? Or the human body can develop either through the normal slow evolution of an accelerated spiritual revolution new possibilities of thought, new kind of thought, new kind of subjective self-experience and world experience, new ways and processes to receive vital energy and of a higher and superior kind, and as a result of this progressive evolution a new being with a new body which would be naturally tuned to new and higher states of consciousness, develop new faculties and powers, new ways of knowing and feeling and acting. Both common sense and the logic of evolution would say yes. Spiritual experience would also point us in the same direction.
It was given to Sri Aurobindo and the Mother to actually attempt and work out this possibility with their vast spiritual knowledge, power and experience. They were missioned for it so to say and their Tapasya was directed towards opening the doors of the Supramental Consciousness on one side while on the other, offering their physical body as the first pioneer towards this high divine possibility. However, they did not want to achieve the Supramental Transformation for themselves in an isolated way leaving aside the rest of humanity. It would then create a near unbridgeable gulf between the Supramental Transformation and the present mental man. Besides the Supramental Manifestation by its very nature had to be a collective one since it would imply a change in the law that presently govern earth nature and mental man. The Supramental being is not meant to be a freak with no real connection with mankind of today. This could only be done by tying them to the sample of humanity that had begun to gather around them. Sri Aurobindo became the spearhead forging towards the future with the rest linked to him. The result was that those connected with him could resist and delay his advance on which the advance of the rest depended. Or they could collaborate by reducing the burden that they had to carry. This was the reason of the delay and the eventual plunge into the Inconscient which is the seat of all resistance. Death is simply a symbol of this stark resistance in earth nature to any forward march and Godward evolution and change. It is the ultimate inertia, the Night that refuses the advent of Light, dims the aspiration throwing doubt and despair, steals hope and faith.
Sri Aurobindo’s plunge into the Inconscient was the cause of the phenomenon of what we call as his death or departure. This was not in helpless obedience to the earthly law to which we are ordinarily subject. Rather it was in defiance of it, to challenge the Night in its own home or den. Trailing him there descended the Supramental Light from above to which his body was the link and the bridge between the Divine Supermind and mental man. This descent became the symbol of a promise, an achievement that could have only gone thus far unless one left the rest of humanity behind. His plunge cleared the passage for the subsequent Supramental Manifestation on the 29th February 1956 which took place as the Mother continued the work here while Sri Aurobindo took his station in the subtle physical and worked upon the world forces from behind.