separationist Christology

I am at present reading a book called Misquoting Jesus by Bart D.Ehrman.
Does anybody on the forum know about the Gnostic ideas of creation.
I wondered who is the "she" the author is referring to.Is this Sophia?
How do you feel about this creation theory which is below?
Below is a quote from the above book.


This separationist Christology was most commonly advocated by 

groups  of  Christians  that  scholars  have  called  Gnostic.  The  term 
Gnosticism comes from the Greek word for knowledge, gnosis. It is 
applied to a wide range of groups of early Christians who stressed the 
importance of secret knowledge for salvation. According to most of 
these groups, the material world we live in was not the creation of the 
one  true  God.  It  came  about  as  a  result  of  a  disaster  in  the  divine 
realm, in which one of the (many) divine beings was for some myste­ 
rious reason excluded from the heavenly places; as a result of her fall

from divinity the material world came to be created by a lesser deity, 
who captured her and imprisoned her in human bodies here on earth. 
Some human beings thus have a spark of the divine within them, and 
they need to learn the truth of who they are, where they came from, 
how they got here, and how they can return. Learning this truth will 
lead to their salvation. 
This  truth  consists  of  secret  teachings,  mysterious  "knowledge" 
(gnosis), which can only be imparted by a divine being from the heav­ 
enly realm. For Christian Gnostics, Christ is this divine revealer of the 
truths of salvation; in many Gnostic systems, the Christ came into the 
man Jesus at his baptism, empowered him for his ministry, and then 
at the end left him to die on the cross. That is why Jesus cried out, "My 
God, my God, why have you forsaken me?" For these Gnostics, the 
Christ literally had forsaken Jesus (or "left him behind"). After Jesus's 
death, though, he raised him from the dead as a reward for his faith­ 
fulness, and continued through him to teach his  disciples  the secret 
truths that can lead to salvation.