Plotinus described his experience of transcendence and an intense, deeper, personal encounter with what Christians call the Shekinah Glory of God. It is an immediate experience of the transcendence of realty. Some of course would say that it is just an inward, psychological event, yet to those that experience it, reality itself and the boundaries of subject-objective being are briefly overcome, That is an experience of the super natural or super reality.
What Plotinus called heyschasm is an unforgettable experience yet it too fades somewhat with time, as it must for the individual need exist in reality until the end of his life. Plotinus incidentally was regard as a heretic by the early church for claiming to have directly experienced God.