Gnostic and Hermetic texts share a late-antique environment and a language of revealed knowledge, but they do not describe the cosmos, salvation or the human condition in the same way.
Why they are grouped together
Both bodies of literature use dialogue, revelation and ascent. Both attracted readers interested in knowledge that transforms the knower. Modern anthologies therefore place them near one another, and esoteric histories often tell their reception stories together.
Similarity of form is not identity of doctrine. “Gnosticism” is itself a debated umbrella for several movements and texts. Hermetic writings also vary, but many present the ordered cosmos as meaningful and capable of revealing divine intelligence.
The practical distinction
When a writer calls matter a prison, identify the source and argument. When another treats cosmic order as a path to reverence, do the same. Their accounts of embodiment and creation shape what “knowledge” is meant to accomplish.
Building a reading shelf
Choose separate scholarly introductions for Hermetic and Gnostic materials, then readable translations with notes. A comparative study is most useful after the source traditions are visible on their own terms.