When psychotherapy began, it was about the practitioner listening to a patient and interpreting what the patient said, in order to afford the patient insights about his or her psyche. But now we understand that the main curative part of psychotherapy is the relationship itself. It appears not to be relevant which psychology school the practitioner belongs to. What matters is the quality of the relationship and the practitioner's belief in what he or she is offering.

You may find that you have been telling yourself that practicing optimism is a risk, as though, somehow, a positive attitude will invite disaster and so if you practice optimism it may increase your feelings of vulnerability. The trick is to increase your tolerance for vulnerable feelings, rather than avoid them altogether.[…]Optimism does not mean continual happiness, glazed eyes and a fixed grin. When I talk about the desirability of optimism I do not mean that we should delude ourselves about reality. But practicing optimism does mean focusing more on the positive fall-out of an event than on the negative. … I am not advocating the kind of optimism that means you blow all your savings on a horse running at a hundred to one; I am talking about being optimistic enough to sow some seeds in the hope that some of them will germinate and grow into flowers.