The opening passage of Savitri has the following lines:

A power of fallen boundless selfawake Between the first and the last Nothingness, Recalling from the tenebrous womb from which it came, Turned from the insoluble mystery of birth And the tardy process of mortality And longed to reach its end in vacant Nought.

If the first Nothingness is the Absolute’s Non-Manifest, avyakta, the last Nothingness is the Absolute’s Void in which everything is held back, which is a creative potential holding the birth of Manifestation in the Absolute’s Possibility, in its Will, samkalpa. This is also the tenebrous womb, the vacant Nought, and the fallen Power is unable to come out of it. It is Savitri who will open out that Possibility, it emerging from the vacant Nought, Savitri who has come here because of the Tapas-Yajna of Aswapati, it forming the base, the support, ādhāra. So this is the Creative Shadow, On the other hand, the Collective Shadow is an aspect of the unfolding Will in the cosmic working, it is a part of the cosmic process, of the evolutionary system in contrast to the foundational Shadow as the aspect of Involution, the extreme self-concentration, the Tapas-Yajna of the Four Powers of Light. This is what the article is trying to indicate. How did the Involution take place—that’s the theme. This is its premise stated briefly. ~ RYD