"Imagine being a nurse in a burns unit. You want to dress the wounds of patients with horrific burns, knowing that the slightest slip will send them to the roof in agony. Just one further complication: the patients are new to you and a power failure combined with emergency lighting having to be diverted to more critical areas of the hospital means the ward is pitch black. You cannot see a thing and the patients are new to you, so you don’t know the precise nature or location of their burns. That’s what it is like relating to someone who has inner pain. Emotional wounds are invisible. You can never be certain who is hurting, nor what well-meaning words will bring them unintended pain."