"This “Higher Self” is Atma, and of course it is “non-materializable... Even more, it can never be “objective” under any circumstances, even to the highest spiritual perception. For Atman or the “Higher Self” is really Brahma, the Absolute, and indistinguishable from it. In hours of Samadhi, the higher spiritual consciousness of the Initiate is entirely absorbed in the ONE essence, which is Atman, and therefore, being one with the whole, there can be nothing objective for it. p 136"
January 1, 1970
https://en.wikiquote.org/wiki/Higher_self