Ashley Stevenson

“How the mind gears itself for its environment, she thought. And she recalled a Bene Gesserit axiom: “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.”
― Frank Herbert, Dune