Chapter 8 shows how close Galen is to the style and language of a practical moralist by focusing on the previously neglected moral aspects of Prognosis. The rich ethical material that Galen includes on the way his society functions and the role of physicians is construed as moral reportage, which also enables him to provide the image he constructs of himself as a medic with profoundly moral features. The essay’s preface stresses the quest for truth and the exercise of correct judgement as moral principles advocated by Galen for physicians and all other professionals as thinking beings. This, I suggest, has a strong theoretical background expounded upon in Galen’s ethical work, pointing to his ideological coherence on ethics and its uniform application across texts of a (seemingly) different purpose. The preface is also informed by Galen’s perception of the morality of doctors addressed in the Therapeutic Method, which I see as a sibling account of Galen’s conceptualisation of medicine as a virtuous art. Furthermore, the delineation of moral character is made central to Galen’s notion of the proper physician, which explains the fact that he formulates his text in such a way as to distinguish himself and his peers from charlatans and sophists, a group of moral outsiders traditionally depicted as quarrelsome and vainglorious. This Chapter also discusses the sophisticated discourse on malice and contentiousness that Galen sets up within the context of some of his medical case histories. The analysis of the writing technique and structure of the case histories as much as of the characters involved offers unique insights into Galen’s account of emotions, especially their causes, consequences, theorisation and phenomenology. This Chapter concludes by stressing how in these instances Galen’s medical activity impinged on the formation and sometimes the development of his moral ideas. In Prognosis ethics emerges as a robust area of thought, study and professional performance in Galen.