Subjectivity seems at once constituted and questioned by a secret that lies at the core of human being and becoming. But how does this secret appear, and what does it consist in? Can we come to know it at all and represent it linguistically, or does it silently remain beyond our grasp? Is it the secret of singularity, or a secret to be shared and kept together with another? The book in hand explores different dimensions of this secret: the dialectics of interiority and exteriority, infinity and finitude, love and language, conscience and the limits of self-understanding, asymmetry and reciprocity in ethics and religion. The exploration takes its point of departure in the works of Søren Kierkegaard and Emmanuel Levinas. It contributes to the clarification of the complex relation of these thinkers and illuminates an issue that has so far not received the attention it deserves: the ambiguity of subjectivity that displays itself in the experience of being oneself despite oneself.