To understand the process of psychotherapeutic change, one must look for the answers in the psychotherapeutic process itself. This process involves the exchange of communications between two (or more) participants, and as a result of the exchange, modifi cations in the personality and behavior of the patient are expected to occur. But what is the nature of the therapeutic messages? How do they produce changes in the patient? What aspects of the messages are important for therapeutic change? And if the therapeutic force is encoded in the messages, shall we look for it in sentence structure,...