Updated: Dec 11, 2021
Video from Let's Talk Religion
"This video gives an overview of the so-called "Gnostics", particularly the group that is often otherwise known as the 'Sethians'." from video introduction.
"There is actually no such thing as Christian Gnosticism, because true Christianity and Gnosticism are mutually exclusive systems of belief. The principles of Gnosticism contradict what it means to be a Christian. Therefore, while some forms of Gnosticism may claim to be Christian, they are in fact decidedly non-Christian.
Gnosticism was perhaps the most dangerous heresy that threatened the early church during the first three centuries. Influenced by such philosophers as Plato, Gnosticism is based on two false premises. First, it espouses a dualism regarding spirit and matter. Gnostics assert that matter is inherently evil and spirit is good. As a result of this presupposition, Gnostics believe anything done in the body, even the grossest sin, has no meaning because real life exists in the spirit realm only.
Second, Gnostics claim to possess an elevated knowledge, a “higher truth” known only to a certain few. Gnosticism comes from the Greek word gnosis which means “to know.” Gnostics claim to possess a higher knowledge, not from the Bible, but acquired on some mystical higher plane of existence. Gnostics see themselves as a privileged class elevated above everybody else by their higher, deeper knowledge of God.".. from the article: What is Christian Gnosticism?