Advaita Vedanta Basics - How to dis-identify Vigyanmaya Kosha - Vivek Choodamani / Choodamani)

202. The cessation of that superimposition takes place through perfect knowledge, and by no other means. Perfect knowledge, according to the Shrutis, consists in the realisation of the identity of the individual soul and Brahman.

203. This realisation is attained by a perfect discrimination between the Self and the non-Self. Therefore one must strive for the discrimination between the individual soul and the eternal Self.

204. Just as the water which is very muddy again appears as transparent water when the mud is removed, so the Atman also manifests Its undimmed lustre when the taint has been removed.

205. When the unreal ceases to exist, this very individual soul is definitely realised as the eternal Self. Therefore one must make it a point completely to remove things like egoism from the eternal Self.

206. This knowledge sheath (Vijnanamaya Kosha) that we have been speaking of, cannot be the Supreme Self for the following reasons - because it is subject to change, is insentient, is a limited thing, an object of the senses, and is not constantly present: An unreal thing cannot indeed be taken for the real Atman.

Source: Vivek Choodamani