Actors are trained never to use any trauma from their own past to induce an emotional episode for an artistic work. Primarily, this is potentially very harmful to the actor and is usually very difficult to repeat. Secondarily, it may work once to trigger emotion but will not be able to be sustained over many performances. The actor is trained to use imagination from the set of circumstances and, through training, allow an honest empathetic and human reaction to the circumstances that may allow honest emotion to arise. The actor must be accepting of the fact that emotion may not always come up. Thus, the actor always pursues the work honestly, which promotes a natural and psychologically healthy, repeatable process.