Mind Resistance

'Not so. You would not have led a charge into it. You would have suspected a trap. You would never have crossed the river in the first place, until you were sure the Nemedian rout was real. Hypnotic suggestions would not have invaded your mind, even in the madness of battle, to make you mad, and rush blindly into the trap laid for you, as it did the lesser man who masqueraded as you.'
-	The Hour of the Dragon (chapter 4)