The aim of this paper is to discuss how teacher professionality can be understood in relation to ethics of alterity and ethics of dissensus, which both, in different ways, express a desire to oppose various forms of violence in society. Drawing on pragmatism, post-structuralism, and psychoanalysis we argue that there is a dialectical relationship between ethics and morality, conscious and unconscious deeds, between theory and practice, and between justice and moral (ethical issues). Also, we stress that the quality of a phenomenon is dependent on a specific purpose which we here formulate as follows: how can teacher professionality, as it isused in order to counteract violence, be grasped in relation to moral theory? Hence, we use the notion of uniqueness, power-relations, and importance to take into account people’s feelings when we discuss teacher professionality and the desire to counteract violence. This standpoint informs our mode of presentation, weaving together empirical examples from student and teacher perspectives with theoretical discussions.