Ātman (Atma, आत्मा, आत्मन्) is a Sanskrit word that refers to the (universal) Self or self-existent essence of human beings[.] The term is often translated as soul, but is better translated as "Self," as it solely refers to pure consciousness [...] In order to attain liberation (moksha), a human being must acquire self-knowledge (Atma Gyaan).

Wikipedia.org: Ātma (Hinduism)