Sri Aurobindo is seeking the leverage that will allow the transformation of earthly life into a divine life. He starts by analyzing the principles of the evolutionary forces we see at work and their ability to carry out this transformative action. Since life on earth begins in the apparent Inconscience of Matter, he starts his review by looking at Matter as the foundation and how it impacts the manifestation of Life and Mind as the succeeding principles to evolve.
“Here the evolution takes place in a material universe; the foundation, the original substance, the first established all-conditioning status of things is Matter. Mind and Life are evolved in Matter, but they are limited and modified in their action by the obligation to use its substance for their instrumentation and by their subjection to the law of material Nature even while they modify what they undergo and use. For they do transform its substance, first into living substance and then into conscious substance; they succeed in changing its inertia, immobility and inconscience into a movement of consciousness, feeling and life. But they do not succeed in transforming it altogether; they cannot make it altogether alive or altogether conscious: life-nature evolving is bound to death; mind evolving is materialised as well as vitalised; it finds itself rooted in inconscience, limited by ignorance; it is moved by uncontrolled life-forces which drive and use it, it is mechanised by the physical forces on which it has to depend for its own self-expression. This is a sign that neither Mind nor Life is the original creative Power; they, like Matter, are intermediaries, successive and seried instruments of the evolutionary process. If a material energy is not that original Power, then we must seek for it in something above Mind or Life; there must be a deeper occult Reality which has yet to disclose itself in Nature.”
Sri Aurobindo, The Life Divine, Book 2, Part 2, Chapter 18, The Evolutionary Process — Ascent and Integration