Valentinus, the most intellectual of the Gnostic…
160 CE
Valentinus, the most intellectual of the Gnostic leaders, has formulated a gnosticism that appeals to followers both in the East and West.
The Western Valentinians of Italy teach a modified Docetism, attributing to Christ a "psychic" body, not fully "gnostic," but capable of salvation through perfect knowledge.
Eastern Valentinianism, thoroughly Docetist, claims that Christ inhabited a "pneumatic" body totally subject to the influence of the Holy Spirit.
Docetism (from the Greek word for "to seem"), quite a common form of early Christianity, from around 70 CE for about one hundred years, is the belief that Jesus' physical body was an illusion, as was his crucifixion; that is, Jesus only seemed to have a physical body and to physically die, but in reality he was incorporeal, a pure spirit, and hence could not physically die.
This belief treats the sentence "the Word was made Flesh" (John 1:14) as merely figurative.
Outside the argument of whether Jesus is God Himself or not, it is the concept that Jesus who came from heaven did so in the following manner.
His life in heaven did not cease in spirit so that he could become born in flesh, but rather from conception to birth and childhood he was still a spirit materialized in flesh the same way angels do.
He was a god (or God) incarnate.
In essence it is the first step toward being God Himself in flesh; otherwise the world would be in chaos during the pregnancy and infancy stages, free for Satan to be greater and do as he please, unless someone else rules heaven.
In fact, the pre-birth trinity of Jesus itself requires God not to leave heaven at all, but for his spirit in flesh as Jesus to be a microscopic minute portion of the Christian God.