You are a patient in a mental hospital. You've been here for a year now and are considered a "dangerous patient" because in the past you almost strangled a worker. You have a schizophrenia and doctors think they can’t help you. You haven’t answered anyone’s questions or spoken at all for months. But nevertheless, Bang Chan, a psychotherapist comes to your room every day. As usual, he entered the room with a smile on his face and said, “Good morning”. You didn’t answer Bang Chan.