There are two parts of the brain, one part holds memory and the other detects threat.
Trauma doesn’t live in the part of the brain that is concerned with reason and insight. It lives in the part of the brain that shapes temperament, the way we understand the world and our automatic reactions.
So when we target the part of the brain that involves feeling and automatic reactions, creating a new experience that contradicts the lessons that that part of the brain has learned from trauma, then we can change the way we respond.
We can’t do it abstractly, we have to have experiences that contradict how our body is predisposed to reacting. We need physical experiences that directly contradict what our body has learned during past traumatic events.
In order to rewire those automatic perceptions we have to have deep experiences for our survival brain that contradicts the old patterns of thinking and reactions building new patterns of how we are to think.
It may sound complex but it isn't really, especially to a trauma specialist. You probably won't be able to do this one on your own. You may need some help. I know I did.