Being and Time Heidegger was forced to prepare the book for publication when he had completed only the first two divisions of part one. The remaining divisions planned for "Being and Time" (particularly the divisions on time and being, Immanuel Kant, and Aristotle) were never published, although in many respects they were addressed in one form or another in Heidegger's other works. In terms of structure, "Being and Time" remains as it was when it first appeared in print; it consists of the lengthy two-part introduction, followed by Division One, the "Preparatory Fundamental Analysis of Dasein," and Division Two, "Dasein and Temporality." Heidegger
Being and Time of what a hammer "is" is not determined by a theoretical understanding of its presence, but by the fact that it is something we need at the moment we wish to do hammering. Only a "later" understanding might come to contemplate a hammer "as" an object. The total understanding of being results from an explication of the implicit knowledge of being that inheres in "Dasein". Philosophy thus becomes a form of interpretation, but since there is no external reference point outside being from which to begin this interpretation, the question becomes to know in which way to proceed with this