Gnosticism (n.) is in reality a passion for thinking and knowing — which is why the passionate thinker Tertullian had to hate it.
Gnosticism (n.) is man's unconscious psychology in full, almost perverse, flower: a belief in individual revelation and knowledge so proud of man's kinship with the gods that it thought it could subdue them by Gnosis.
The Gnosticism (n.) were, most of them, not so much heretics as theologians.
The Gnosticism (n.) were, many of them, nothing other than psychologists — gnosis a psychological knowledge whose contents derive from the unconscious.
Gnosticism (n.) did not grow out of Christianity; it is far truer to say Christianity was assimilated through Gnosticism.
Gnosticism (n.) is the mind's prodigious attempt to know the cosmos from within, as natural science is a herculean attempt to understand the psyche from without; man stands between the two realms, often denying one.
Gnosticism (n.) needs the same psychological understanding as psychotic delusion, Jung argued: its ideas are not mere symptoms of history but creative new forms that fed Paul, John, alchemy and the Kabbala.