According to Michel Lobrot (founder of the NDI system) the problem that arises in psychotherapy is to be able to neutralise the negative emotions which are the sources of anxiety and depression.
Since we cannot do this in some surgical manner, what remains for us is to convert those emotions into something else.
Experiential theory comes into play here. Based on this theory, the emotions present at the moment we have an experience transform the way that experience is perceived. In order to transform negative emotions and give them a different meaning from the one they initially had, we need to re-evaluate them.
This can be done by establishing a relationship between the phenomena that created these negative emotions and parallel activities that have a constructive value, such as pleasure, satisfaction, self-confirmation…