The first chapter claimed that authentic existence, as Heidegger understands it, demands art, i.e. that "The Origin of the Work of Art" addresses what may be considered an incompleteness in the understanding of authenticity developed in Being and Time. The second chapter addressed the nature of that incompleteness by linking it to a certain one-sidedness of Heidegger's analysis of authenticity. Instead of "one-sidedness" I could also have spoken of the all too formal character of Heidegger's analysis of authenticity.