In the Upnishadas in the tradition of Sanatan Dharma, Paramātman is said to be dwelling in the subtle form, as Ātman, in the core of the heart of a living being. Atman gives each and every positive thoughts, and gives rise to positive conducts, behaviors and activities, which nurtures the heart in the return.That's why the heart is called pure. But it's not the heart itself but Ātman that is pure, which reflects the heart.
Each and every negative thought conduct, behavior and activity, on the other hand, comes to the mind and body from the outer world, materialistic worldly-objects and the physical bodies including one's own. They causes impurities in the body and mind which make the heart impure and shrink.
In the Upnishadas in the tradition of Sanatan Dharma, Paramātman is said to be dwelling in the subtle form, as Ātman, in the core of the heart of a living being. Atman gives each and every positive thoughts, and gives rise to positive conducts, behaviors and activities, which nurtures the heart in the return.That's why the heart is called pure. But it's not the heart itself but Ātman that is pure, which reflects the heart.
Each and every negative thought conduct, behavior and activity, on the other hand, comes to the mind and body from the outer world, materialistic worldly-objects and the physical bodies including one's own. They causes impurities in the body and mind which make the heart impure and shrink.