I often come across people talking about Gnosticism and Christian mysticism as if they are the same thing, or at least essentially compatable. But this is to ignore deep differences in how the two paths understand God and creation.
In responding to one Gnostic blogger I replied:
You said, "I mean much of the works attributed to the Demiurge and archons serve essentially the same purpose as the Devil and demons. In fact the two seem to be the same in the early writings." I disagree and would say any resemblance is purely superficial.
The Gnostics identified the Demiurge with YHWH, not Satan. For them there was a fundamental dualism between YHWH of the Old Testament and the Father of the New Testament. They distanced themselves from Judaism and the Old Testament in a way Christian mystics never did. At it most extreme this even led them to rewrite Genesis with the snake (the Father) as the hero instead of YHWH (the Demiurge). If that's not a fundamental conflict I don't know what is. Ultimately it led them to an emanationist understanding of creation, with multiple godforms involved, rather than creation by one and only one Creator. Christians, mystics and otherwise, have always rejected such Gnostic teaching which denies YHWH and the Father are one.
I do not know what your experience is with Gnosticism, but the deeper I explore Gnosticism the deeper the differences between Gnosticism and Christianity seem.
For more on Christianity and Gnosticism see: