The prayer is as follows.

June 16, 1914

Like a sun Thy splendour descends upon the earth and Thy rays will illumine the world. All those elements which are pure enough, plastic enough, sufficiently receptive to manifest the very splendour of the central fire-nucleus are grouping themselves together. This grouping is not arbitrary and does not depend on the will or aspiration of one element or another, it depends on what it is, it is independent of any individual decision. Thy splendour wants to radiate; what is capable of manifesting it manifests it, and these elements gather together to reconstitute as perfectly as possible in this world of division the divine Centre which has to be manifested.

In the wonder of this contemplation all the cells of the being exult; and, seeing That which Is, the integral substance passes into an ecstasy. How can this substance be now distinguished from Thyself? It is Thou—completely, entirely, intensely—in a perfect identification, Thou.

(Ref. https://incarnateword.in/cwm/01/june-16-1914)

The essence of the above prayer is that a New Light is entering the earth and beginning to build a centre, the Fire nucleus around which all who have been called or chosen will gather and come together to form the Divine Centre through which this New Light would manifest.

This centre is first being formed in and around the Mother whose body and being is completely identified with the Divine. Around Her will gather those who are ready and capable of manifesting this Light due to their past evolution. 

Affectionately,

Alok Da