In Theosophy, the Monadic Plane is the plane in which the Monad (also called the Holy Spirit or the Oversoul) is said to exist. The term "Monad" is from the Greek word μονάς (monas), which means "singularity", and was used by Ancient Greek philosophers such as Plato. According to Alan Schneider, the Monadic Plane is the Sixth Plane of Ascension, and is analogous to the Sixth Chakra, Ajna, and the Hidden Sephirah of the Cabalistic Tree of Life – Daath, whatever that means. It would appear, though it is not certain by any means, that it is possible for a human to attain this spiritual realm after ascending through lower, possibly inferior, planes of existence. The Physical plane being the lowest of all. It is rare occurrence indeed to meet someone on the Monadic plane, and thus of great spiritual significance.
'Classical' 1800s Theosophy does not say the monad is human, but Annie Besant & Charles Leadbeater may have said so, and Alice Bailey or others, who uses similar ideas, did say so. The Arcane School ideas also use the concept of the Monad. Some schools of thought equate the Monadic Plane with the Hyperplane, while others view the Monadic Plane as enclosing and interpenetrating many hyperplanes.
- "The Monadic Plane". www.searchlightforyou.com. Retrieved 2019-04-28.