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Henosis ("Ancient Greek: ἕνωσις) is the classical Greek word for mystical "oneness", "union" or "unity." In "Platonism, and especially "Neoplatonism, the goal of henosis is union with what is fundamental in reality: the One (Τὸ Ἕν), the Source, or "Monad. The Neoplatonic concept has precedents in the Greek "mystery religions as well as parallels in "Eastern philosophy. It is further developed in the "Corpus Hermeticum, in "Christian theology, "Alevism, "soteriology and "mysticism, and is an important factor in the historical development of "monotheism during "Late Antiquity.
The term is relatively common in classical texts, and has the meaning of "union" or "unity".[note 1]
Henosis, or "primordial unity, is rational and deterministic, emanating from "indeterminism an uncaused cause. Each individual as a "microcosm reflects the gradual ordering of the universe referred to as the "macrocosm. In mimicking the demiurge ("divine mind), one unites with The One or Monad. Thus the process of unification, of "The Being" and "The One," is called henosis, the culmination of which is "deification.["citation needed]
Henosis for Plotinus (204/5–270 CE) was defined in his works as a reversing of the ontological process of consciousness via "meditation (in the Western mind to un"contemplate) toward no thought ("nous or "demiurge) and no division ("dyad) within the individual (being). As is specified in the writings of "Plotinus on "Henology,[note 2] one can reach a "tabula rasa, a blank state where the individual may grasp or merge with The One. This absolute simplicity means that the nous or the person is then dissolved, completely absorbed back into the Monad.
Within the "Enneads of Plotinus the Monad can be referred to as the Good above the demiurge. The Monad or "dunamis (force) is of one singular expression (the will or the one is the good), all is contained in the Monad and the Monad is all ("pantheism). All division is reconciled in the one, the final stage before reaching singularity, called duality (dyad), is completely reconciled in the Monad, Source or One (see "monism). As the one, source or substance of all things the Monad is all encompassing. As infinite and indeterminate all is reconciled in the dunamis or one. It is the demiurge or second emanation that is the nous in Plotinus. It is the demiurge (creator, action, energy) or nous that "perceives" and therefore causes the force (potential or One) to manifest as energy, or the "dyad called the material world. Nous as being, being and perception (intellect) manifest what is called soul ("World Soul).
Plotinus words his teachings to reconcile not only Plato with Aristotle but also various World religions that he had personal contact with during his various travels. Plotinus' works have an "ascetic character in that they reject matter as an illusion (non-existent). Matter was strictly treated as "immanent, with matter as essential to its being, having no true or "transcendential character or essence, substance or ousia. This approach is called philosophical "Idealism.[note 3]
Within the works of "Iamblichus of Chalcis (c. 245 – c. 325 AD), The One and reconciliation of division can be obtained through the process of "theurgy. By mimicking the demiurge, the individual is returned to the cosmos to implement the will of the divine mind. One goes through a series of theurgy or "rituals that unites the initiate to the Monad. These rituals mimic the ordering of the chaos of the Universe into the material world or "cosmos. They also mimic the actions of the "demiurge as the creator of the material world. Iamblichus used the rituals of the mystery religions to perform rituals on the individual to unite their outer and inner person. Thus one without conflict internal or external is united (henosis) and is The One (hen).
In "Eastern Orthodox Christianity, but also in western mysticism, henosis can be acquired by "theoria, "hesychasm and "contemplative prayer. Yet, the concept of "theosis, or deification, differs from henosis, since created beings cannot become God in His transcendent essence, or "ousia.