Introduction
Haurvatat, "Wholeness" or "Health" (later Khordad), is one of the six Amesha Spentas, personifying completeness, well-being and health, and traditionally associated with the element of water.
The Amesha Spentas ("Bounteous Immortals") are six (or, counting Ahura Mazda himself as their head, seven) divine beings who represent and administer aspects of Ahura Mazda's good creation. Zoroastrian theology generally treats them as emanations or aspects of Ahura Mazda's own nature rather than as separate offspring in an ordinary genealogical sense, and each is opposed by one of the six chief daevas in Zoroastrian dualism.
Wholeness and water
Haurvatat represents the state of completeness and flourishing health that Ahura Mazda's creation was meant to enjoy, before Angra Mainyu's assault introduced disease and decay. Her particular association with water reflects water's essential role in sustaining life and health in the Iranian world.
Pairing with Ameretat
Haurvatat is frequently paired in Zoroastrian texts with Ameretat, "Immortality"; together the two represent the ultimate reward promised to the righteous, health and long life leading finally to immortality, and they are often invoked together in ritual contexts, particularly relating to plants and vegetation.
Opposing daeva
Haurvatat is opposed by Taurvi, one of the six chief daevas, associated with the causes of ill health and premature death, standing in direct opposition to Haurvatat's domain of wholeness.