In this paper, I discuss the importance of psychoanalytically informed supervision and training of nurses and other professionals in mental health settings. Using examples from supervision groups I will illustrate how a psychoanalytic approach to mental health can complement other ways of thinking about practice and management. Psychoanalysis provides a framework for understanding the relationship between the internal world of the patients, the therapeutic relationship and the social system. I will also argue that this understanding helps to develop and maintain therapeutic factors while reducing the risk of damaging behaviour and beliefs.