Much thinking in psychology and related forms of psychotherapy is in the grip of a conception of inner-outer relationships that distorts the reality of our lives and world. In his later work, and in the last years of his life especially, Wittgenstein battled against this. In the course of his criticism, he developed vivid images that challenge this picture, revealing its limitations and opening the way to better understanding. Although 70 years have passed since Wittgenstein died, it remains the case that psychology and psychotherapy can be strengthened through more careful attention to his criticism. The present discussion endeavours to show why and how this is so.