The desire for the Divine or for bhakti for the Divine is the one desire which can free one from all the others — at the core it is not a desire, but an aspiration.
Savitri has arrived at the doors of the Unknowable where she has to make a choice ...whether she merges into Nothingness ... or else she comes back... and redeems the world.
The past in Yoga is no guide to the future. For what happened in the past was due to temporary and not permanent causes and to eliminate them is the very purpose of the sadhana.
It is the coming down of the first Avatar to wake up the earth to Consciousness — that is, to bring an intensity of Consciousness and Realisation in this inconscient world.
About Savitri | B1C1-08 Memory of Past Attempts (p.4)