In the light of the modern idea of a sovereign and self-transparent subject, the paper evaluates the philosophical and ethical relevance of Bildung. As a first step, (the early) Nietzsche's and Adorno's criticism of Bildung is explicated, a criticism based upon the thinkers' critical stance towards the modern epistemological relation of subject and object. However, neither thinker abandons the concept of Bildung. The second part of the paper accordingly reconstructs Nietzsche's and Adorno's adherence to Bildung understood as a different relationship of subject and object within Bildung. In the paper's concluding reflections there is an attempt to assess the systematic educational consequences, and to shed light on the ethical relevance, of a non-transparent subject of Bildung.