The research question arises from working with adolescents who present a particular apathy in their behavior, being exemplary compliers of their duties but in turn raising a complaint to the feeling of emptiness and inertia that invades them, without being able to find any motivation in the study, but neither in sharing with others or enjoying a hobby. In this context, appears the ancient sin of acedia, developed mainly by Catholic authors such as Evagrio the Ponticus and St. Thomas Aquinas, but also used in modernity to think of some difficulties related to the affect by authors within the psychoanalysis. This sin, in its formulation as the rejection of divine goods and active laziness, proves to be useful in allowing the situation of desire in adolescents to be thought. A path is then undertaken to articulate the acedia with the dynamics of today's society, particularly with the logic of capitalist discourse, the moment of adolescence and the concept of desire in psychoanalysis. In this way, the old sin is updated to think, in the light of two clinical cases and the analysis of a television show of anime, the contributions that this can give to psychoanalysis, in particular to the concept of desire,opening a field to think problems such as the desire of the Other or moral cowardice in Lacanian developments.