The principle of the process of evolution is a foundation, from that foundation an ascent, in that ascent a reversal of consciousness and, from the greater height and wideness gained, an action of change and new integration of the whole nature.
Aurobindo articulates foundation as the indispensable ontological base — Matter — from which the entire evolutionary and spiritual ascent of consciousness proceeds, requiring reversal before integration becomes possible.
, The Life Divine, 1939thesis