Would it be safe and helpful for him to hear a recording of the channeling session, or too upsetting?

He is upset by what is going on within him already. At times that becomes almost overwhelming for him. Learning more about why this is so, that makes it more understandable, will help reduce his fear and concern by taking away some of the mystery as well as some of the uncertainty that in itself is highly disturbing, that he is in danger at times of losing control of himself and potentially causing harm to those he cares about. To have a better understanding of this, even though unpleasant, will be reassuring rather than trigger him unduly and cause greater worry, so this would be safe to do and helpful.