The diagnosis of the spiritual skin affliction known as “tzaraat”’can only be diagnosed by a kohein (priest). A reason given is that kohanim (priests), known for their kindness and compassion, are the only ones that can tell someone they have a spiritual affliction (tzaraat) that they need to fix.
Similarly, if we are angry or upset with our child, it is not the time to tell him that he has an issue that he needs to work on. At that point the potentially beneficial message will not be absorbed as the context for change is safety, love and compassion not frustration and anger. First cool down, feel his struggle and then encourage and support him as he works on change.
Compassion is the first step toward a cure.