Quotations:

“The mind can go either direction under stress—toward positive or toward negative: on or off. Think of it as a spectrum whose extremes are unconsciousness at the negative end and hyperconsciousness at the positive end. The way the mind will lean under stress is strongly influenced by training.” — Bene Gesserit axiom (Dune) — Bene Gesserit axiom (Dune)

This is a Bene Gesserit axiom from Dune. If you don’t know, the Bene Gesserit are space witches, in one of the great sci-fi/fantasy worlds ever created.

The relationship to Epic thought is clear: sober thinking is needed (“training”) to encourage the mind toward the positive.