In "The Error of Narcissus," Louis Lavelle (1883-1951) presents a philosophical meditation on the myth of Narcissus. He argues that self-realization, far from being a self-centered admiration, requires not turning against oneself but acting and reaching out to others. In this book, Lavelle explores the concept of self. For Lavelle, the self is movement, becoming, overcoming anxiety, and freedom. Based on the hero from Ovid's story, who was fascinated by his own image in water, he shows in brief meditations that the self is threatened with death if it remains fixed on itself, on an object, and in the past. What is most secret in the self can only be understood in its relationship with others, in the reception of other subjectivities. Self-consciousness must then be found to liberate the soul and access the spiritual space. Louis Lavelle was for a long time unjustly forgotten. Today, rediscovered, the importance of his work seems perfectly suited to what we are living. Lavelle includes human sciences, psychoanalysis, and anthropology in an essay that reveals him as one of the great metaphysicians of the last century.