Congruence defines the degree to which parts that belong together match. This is, for example, verbal and nonverbal communication, that is, the extent to which a person's words, actions and body language match. In other words, the question is whether thinking, feeling and the body are in harmony. Do a person's verbal and nonverbal expressions match congruently? Congruence, then, in hypnosis refers to verbal and nonverbal communication - to what extent they are in harmony. It can also be observed in hypnosis whether there is unconscious, inner resistance, for example, to a change process.