Harmful knowledge / fear of knowledge

[Callum Finlayson]

So I'm in the process of writing up an old campaign that never got finished, the big-bad of would have been a Sahkil Tormentor who was concerned with the fear of knowledge (epistemophobia).

One key part of this is that there is a certain piece of knowledge that has a particularly dangerous effect -- simply knowing it is harmful.

But I keep getting the nagging feeling that I've forgotten something already in the setting lore that touches on this -- probably Golarion, but possibly PF more generally, probably 1E since 2E-specific lore is still small enough that I'm pretty sure I've checked all the likely bits.

My Goolge-fu has failed me on this, and I might just be thinking of something from the obvious source of perfectly rational fear of terrible knowledge -- CoC

But, have I missed something from PF lore that already touches on this?

[James Jacobs]

Yup—it's an adventure path plot:

Spoiler:

Strange Aeons—particularly the way Xhamen-Dor infects people when they learn about him, but also playing off the classic Lovecraftian trope of "some things humanity shouldn't know."

[Callum Finlayson]

I'm impressed I managed to miss an answer that obvious! :)

Thanks James