This chapter presents a new, arts-based concept for leadership development, called Shibboleth. Effects of the Shibboleth concept were studied in a scientific experiment at Karolinska Institutet in comparison with conventional leadership training. The background, execution, analysis and interpretation of the results are discussed. The two different programs have affected the participants, and consequently their co-workers, in strikingly different ways. The Shibboleth concept seems to counteract poor leadership resulting in a strengthening of the psychosocial and neurobiological resilience processes of their co-workers. The conventional program was observed to have a contrary effect. Based on the empirical findings, the concept of aesthemetics – transformation by virtue of aesthetic, emotion and ethics – is presented and discussed.