Buddha told Manjushri,
"As an analogy, it is as if in the thousands of worlds, all the grasses, trees, bushes, straw, hemp, bamboo, reeds, mountains, stones, dust and every object is made into the Ganges River. And each grain of sand in the Ganges River becomes a great world. And each speck of dust in each world is compared to an aeon. And within those aeons the specks of dust that would accumulate would also become aeons. Increase this amount a thousand times and this is how long Kishitigarbha has maintained the position of the Tenth Ground - the highest ground or position that a Bodhisattva can reach. Manjushri, the power from Bodhisattva's vow is unimaginable."
