I want to know the answer to the following question:
To what does the concept of atman refer?
All the background I'm provided with is that "Jīvanmukti (liberation during life) can be achieved through Self-knowledge, the understanding that ātman within is same as ātman in another person and all of Brahman – the eternal, unchanging, entirety of cosmic principles and true reality.". Is that enough to answer the question?
Answer: no