Karuṇā: Compassion
Karuṇā is the heart's trembling at another's pain. Word has reached the palace that every Jew in the empire is marked for a single day of slaughter, and Esther, safe behind harem walls, turns toward that danger. Compassion of this kind shows itself as movement, out of safety and toward the people who have none.
Sāmaggī: Concord
Sāmaggī is the unity of a community acting as one. "Gather together all the Jews who are present in Susa" turns a scattered, frightened population into a single body doing one thing at one time. She places herself inside it: "I and my maidens will also fast the same way," queen and servants on the same empty stomach.
Cāga: Relinquishment
Cāga is the open-handed setting down of what one holds. Three days and nights with no food and no water gives up the most basic comfort a body clings to, and behind that she is giving up more: the crown, the king's favor, the protection of being chosen. Letting go of food is practice for letting go of the rest.
Adhiṭṭhāna: Resolve
Adhiṭṭhāna is a decision fixed before the moment of testing. "Then I will go in to the king, which is against the law" is settled three days early, so that when she finally walks the corridor there is nothing left to decide. A resolution made in advance carries a person past the point where fear would turn them around.
Maraṇasati: Mindfulness of death
Maraṇasati is keeping one's own death in plain view. The law is clear: anyone entering the inner court unsummoned dies unless the golden scepter is extended, and she says that outcome out loud instead of pushing it to the edge of her mind. Three days of hunger become three days of looking straight at it, which drains its power to ambush her.
Upekkhā: Equanimity
Upekkhā is the mind that stays level whichever way things fall. "If I perish, I perish" leaves both outcomes standing and bargains with neither; she goes in with no promise that it will work. Balance of that kind is what makes the step possible, since waiting for a guarantee would keep her behind the door forever.