The four great powers of the Mother are not the only powers that She manifests or that play a role in the evolutionary development. They are the primary forces at work and they carry out the bulk of the transforming effort. Once they have become well established and integrated into the earth nature, and work together in a unity of purpose, it is then possible and essential that additional powers of the Mother should manifest to provide completeness to the transformation that unites the heights of the Spirit with the depths of Matter.
“There are among them Presences indispensable for the supramental realisatino,–most of all one who is her Personality of that mysterious and powerful ecstasy and Ananda which flows from a supreme divine Love, the Ananda that alone can heal the gulf between the highest heights of the supramental spirit and the lowest abysses of Matter, the Ananda that holds the key of a wonderful divinest Life and even now supports from its secrecies the work of all the other Powers of the universe.”
The limitations of the human personality make it difficult for these more rarified and refined powers to come to the front and act openly. Sri Aurobindo sets forth the conditions: “Only when the Four have founded their harmony and freedom of movement in the transformed mind and life and body, can those other rarer Powers manifest in the earth movement and the supramental action become possible.”
The result of this transformation is the ultimate goal of the evolutionary effort: “Then can human nature change into dynamic divine nature because all the elemental lines of the supramental Truth-consciousness and Truth-force are strung together and the harp of life is fitted for the rhythms of the Eternal.”
Sri Aurobindo, The Mother, Chapter Six, pp. 55-57