The recovery of the ANS can begin whenever a feeling of safety can be reached in the “here and now” interaction. At the practice, it is all about the atmosphere that should be made as safe as possible, considering the patient’s situation and unique background. From the perspective of the present safe reality, the patient may start to comprehend their history in a new way and gain critical insights about how they are really feeling – and more essentially – who they really are. Sometimes, an indication of an acquired feeling of safety is the sudden improvement in the patient’s thinking ability, which is a very pleasant experience. This kind of development can occur in the course of psychotherapy. It reflects in a very concrete manner a gradual recovery from childhood trauma. However, it is not very easy to build a relationship that would restore the functioning of the ANS, not for the therapist either, because the unbearable emotional states of the traumatized individual are so often just behind the corner. At any time, they have the power to shift the atmosphere towards unsafety. What is most important is that the mistakes are corrected and the experience of safety restored. Yet, it is also necessary to investigate what it was that actually triggered the reaction! It might be a moment of tactlessness on the therapist’s behalf, or it might as well be the sound of an ambulance passing by. Emotional trauma is caused by unbearable emotional experiences, and the ANS is for its part very closely related to affects and emotions. One is constantly in some kind of emotional state, even when they are calm and at their most rational. Calmness is as much of an emotion as anger. Thus, it is wrong to state that a person is emotional only while having a seemingly irrational, intense emotional experience. According to present understanding, emotional states that are overriding rational thought can be seen as states linked to the individual’s defense system, that in turn are theoretically connected to traumatic memories. Effective affect regulation implies that however difficult emotions we face, they cannot override our judgment or paralyze our functioning capacity. Affect regulation is crucial for attaining an experience of safety and being able to appease other people. In the treatment of trauma, safety is always the most important thing. It can be said that when therapy is progressing appropriately and affect regulation is improving, the person will be able to face even the more difficult things in a safe way. Still, for this kind of safety to develop, we need another person who is worth our trust. In Finland, new theoretical insight on the ANS has gained rather little attention. However, it plays a significant part in helping the trauma therapist and his patient along the path of recovery.