Upanishads[edit]
Ātman is a central idea in all the Upanishads, and "Know your Ātman" their thematic focus.[8] These texts state that the core of every person's self is not the body, nor the mind, nor the ego, but Atman - "Soul" or "Self".[9] Atman is the spiritual essence in all creatures, their real innermost essential being.[4][10] It is eternal, it is the essence, it is ageless. Atman is that which one is at the deepest level of one's existence. The Upanishads suggest that