Brahman: the world souls that contains and unites all atams
Atam: the individual soul of a living being
--------------------------------------
When a person understand the relationship between Atam and Brahman, they achieve perfect understanding and they are taken from life. This isn't always achieved in one lifetime, therefore you will continue to reincarnate from life to life until moksha is achieved.
Hindu teachers tried to find the meaning of the Vedic Hymns. The teachers put their thought onto what would be known as the Upanishads
How Buddhism spread to other countries
It was written about how a person can achieve liberation from desires and suffering. They distinguished between Atam and Brahman.
--------------------------------------
They explained the unifying spirit of Brahman.
--------------------------------------
After Buddha's death, missionaries travel around Asia to spread his faith.
They went to Sri Lanka and Southeast Asia
They also brought ideas Central Asia trade routes to China.