Savitri successfully navigates through the eternal Night. But the fate of Satyavan cannot be decided there. After the dread Night of the Inconscience, there remains the twilight regions of the mental and vital worlds where Death reigns still even though weakened. Especially so in the high regions of the Mind, the Heavens of the mental and vital worlds through which the soul passes after death. The final testing ground is the earthly twilight where the Light from Above passes through dusk towards the Night. All these are realms over which Death has some hold or the other.
In this book we see the journey through the twilight zones and the way Death keeps its hold upon the people. We also see the progressive transformation of Death as it passes through these realms. It has four Cantos. The first Canto is about the twilight outbreak of the gods fills our mind and inspires our heart with idealism and uplifting thoughts. But all is sketchy and incomplete here. Therefore Death reminds Savitri about the vanity of the Ideal calling it a malady of the mind and the misleading of man by the gods towards impractical unrealisable things that have no basis in reality. Savitri accepts and challenge and converses with Death showing the errors of his logic by facts that he has deliberately chosen to ignore as well as truths of which he is unconscious. Death finally brings her to the ground of earthly reality, the twilight where all light leaning from Above tends to sink and fade away. Savitri follows him there and eventually confronts Death not only with her wisdom but also her power. Thus ends the dream of Death to keep the human soul forever captive to his dark designs.
About Savitri | B1C2-10 Condition of the World (p.18)