The Impermanent Universe
Traditionally most sand mandalas are destroyed shortly after their completion. This is done as a metaphor of the impermanence of life. The sands are swept up and placed in an urn; to fulfill the function of healing, half is distributed to the audience at the closing ceremony, while the remainder is carried to a nearby body of water, where it is deposited. The waters then carry the healing blessing to the ocean, and from there it spreads throughout the world for planetary healing.