The ethics of Epicurus is a distinct chapter of ancient philosophy and philosophical ethics. If it is interesting, I believe it will be evident—regardless of my translational mediation—through the texts of Epicurus himself. However, if it seems simplistic, it will be my own effort that failed to highlight the opposite but, if I may, also our reading habits. Interesting, at least why and for whom? For historical reasons, because it constitutes a conceptualization of the ancient Greek person regarding urgent issues of ethical action: For our better understanding of the Hellenistic era, in which Epicureanism dominated? (But here lies the question regarding the reasons for our possible interest in the Hellenistic era or more generally in the past.) Because the ethics of Epicurus represents one of the first instances of egoism and hedonism, tendencies that are probably not unfamiliar to us today? Because it is invoked by philosophers as diverse as Nietzsche, Marx, and John Stuart Mill, or researchers who have taught us to understand ancient philosophy differently, such as Pierre Hadot? Is it perhaps interesting and timely, within the context of an increasingly fashionable practical philosophy that aspires to replace psychotherapy with philosophical counseling? Or perhaps because groups around the world understand themselves as Epicurean and profess the serious or picturesque revival of Epicureanism? (...) [Excerpt from the preface text]