Great Self is a term used by Edward Carpenter to refer to what, on the LP, we call Spiritual Ego, Highest Self, Self (with a capital "S), Resident Monadic Consciousness, or even the entire Fabric of Consciousness.
Spiritual Ego > Ajayu, Angel, Atman, Augoeides, Blazing Star, Brahman, Bright Light, Buddha Nature, Deep Self, Divine Ego, Father in Heaven, Genuine Self, God Self, Great Self, Guardian Angel, Higher Genius, Higher Self, Highest Self, Holy Spirit, Immortal Spirit, Inner Radar, Inner Self, Inner-Self, Intensification of Consciousness, Kra, La, Monad, Monadic Consciousness, Monadic Intensification, Neshamah, Ohr, Original Face, Paramatman, Real Ego, Real Self, Sakshi Chaitanya, Saug, Self, Soul, Spirit, Super Ego, Supreme Self, The Knower, The Witness, Transcendental Self, True Self, Unconsciousness, Universal Being, Universal Deity, Universal Self... further results
Fabric of Consciousness > Absolute Mind, Adhi Buddha, Ain Soph Aur, Al-Haqq, Allah, Ancient One, Anima Mundi, Blazing Star, Brahman, Brahmic Splendor, Crown, Divine Fire, Field of the Universe, First Mover, Formless, God, GodHead, Govinda, Great Being, Great Breath, Great Light, Great Self, Guardian Angel, Immortal Spirit, Ineffable Light, Kether, Mind at Large, Nam Shé, Nirguna Brahman, Nondual God, Nonlocal Mind, Oversoul, Primal Self, Primum Mobile, Purusha, Realms of Consciousness, Simurg, Spirit, Supreme, Supreme Spirit, The Dreaming, The Lord, The Old One, The One, The Power and the Glory, Transpersonal Realm, Unconsciousness, Universal Being, Universal Deity, Wakan Tanka... further results
According to Carpenter, The Great Self can be millions of selves
The great Self of the universe may differentiate itself into countless selves or ‘aspects’—and this may be a condition of more perfect self-knowledge—knowledge—yet each self or aspect may still be the whole and commensurate with the whole....The fact is conceivable that the Self may become countless selves. The great Self is omnipresent in Space and Time; but if it appear or express itself at any one point of space and time (say as the ego of a single cell), then at once and in that moment it has determined an aspect of itself; and the ego in that cell is already an individual having within itself the potentiality of the whole, yet different from every other possible individual of the universe.
When Carpenter suggests the Great Self can be millions of selves, he refers to the Fabric of Consciousness. When he suggests it is in each of us, he refers to Spiritual Ego, Highest Self, Resident Monadic Consciousness, etc.
In the following quote, Carpenter clearly has the Fabric of Consciousness in mind.
With a kind of inexorable logic, from infinitely various beginnings, from infinitely various sides, the Great Self sums itself up to form a vast affiliation of selves—a Celestial City of equals and lovers.