If there has to be the divine manifestation, the supramental Mahashakti must descend and work in the cosmic-terrestrial process. The four powers described by Sri Aurobindo in The Mother belong to this Overmental creation, with the Purusha aspects present only in the background. Unless they work in fullness and harmony the higher cannot come and operate here. These four in us are: understanding, life-dynamism, the sense of love and joy and beauty, and the skill in work, our capacity to attend to minutiae and essentials, they all attaining perfection by which the will in the physical develops, each of the four characterising a certain trait in us, defining our swabhāva. That is how the soul in us grows. In fact it is the soul, the divine element residing in us, who becomes an alchemic agent to bring about the transformation of the complex of this nature. These are the qualities or energies, guņas, śaktis, by which the individual as well as collective evolution advances. Unless these are fully established in their harmony of working the higher powers waiting for manifestation cannot come down. In order to open a way for their coming there is the imperative of the mortal birth of Savitri, a birth founded on the yoga-tapasya of Aswapati.

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