In this paper, I explore Unamuno’s narrative fictions as thought experiments about self and emotion. I begin by developing a notion of thought experiment consequent with his understanding of philosophy as a form of literature. Next, I focus on the philosophy of the emotions implicit in his major essay Del Sentimiento trágico de la vida. The third section offers a case study in the form of envy in the novel Abel Sánchez. The final section addresses different forms of knowledge about (...) the emotions conveyed by Unamuno’s fictional works. (shrink)