Erhart's distrust did seem to support the idea of psykers being fairly limited in human society, at least when they were talking about the Imperium. And even among the humans that he was accustomed to, few were as preternaturally powerful as someone like Nialdi.

Zouichi considered this, along with what he'd asked Alendian earlier. She seemed reliable, and her skill was undeniable, but if the Warp were truly that dangerous... "What would you say if I asked you to teach me?"