After having discussed the seven gradations of consciousness that systematically involve the powers of consciousness into the extreme density of a total Inconscience, Sri Aurobindo next takes up the systematic evolution out of this Inconscience into the full realisation of the Divine Existence, Consciousness and Bliss that is the ultimate destiny of the soul in manifestation.
“This inevitable evolution first develops, as it is bound to develop, Matter and a material universe; in Matter, Life appears and living physical beings; in Lifef, Mind manifests and embodied thinking and living beings; in Mind, ever increasing its powers and activities in forms of Matter, the Supermind or Truth-Consciousness must appear, inevitably, by the very force of what is contained in the Inconscience and the necessity in Nature to bring it into manifestation. Supermind appearing manifests the Spirit’s self-knowledge and whole-knowledge in a supramental living being and must bring about by the same law, by an inherent necessity and inevitability, the dynamic manifestation here of the divine Existence, Consciousness and Delight of existence. It is this that is the significance of the plan and order of the terrestrial evolution; it is this necessity that must determine all its steps and degrees, its principle and its process. Mind, Life and Matter are the realised powers of the evolution and well-known to us; Supermind and the triune aspects of Sachchidananda are the secret principles which are not yet put in front and have still to be realised in the forms of the manifestation, and we know them only by hints and a partial and fragmentary action still not disengaged from the lower movement and therefore not easily recognisable. But their evolution too is part of the destiny of the soul in the Becoming,–there must be a realisation and dynamisation in earth-life and in Matter not only of Mind but of all that is above it, all that has descended indeed but is still concealed in earth-life and Matter.”
Sri Aurobindo, The Life Divine, Book 2, Part 2, Chapter 16, The Integral Knowledge and the Aim of Life; Four Theories of Existence, pp. 663-664