Lord Krishna (His Lilas and Teachings) -Swami Sivananda
One is bound down to the wheel of birth and death by lack of discrimination. The ignorant man does not thus see the Atman to be distinct from the Prakriti (body) and takes them both to be identical. He is deluded by the sense-objects and forges for himself an endless chain of births and deaths.
One becomes a sage or a God by association with Sattva, Asura or man by association with Rajas, and a ghost or a beast by association with Tamas.
Just as a man seeing the performance of singers and dancers involuntarily imitates them in his mind, so also even the Atman is made to imitate the attributes of the intellect by witnessing its qualities.