Being and Time explanation of the understanding preceding any other way of knowing, such as the use of logic, theory, specific regional ontology. At the same time, there is no access to being other than via beings themselves—hence pursuing the question of being inevitably means questioning a being with regard to its being. Heidegger argues that a true understanding of being ("Seinsverständnis") can only proceed by referring to particular beings, and that the best method of pursuing being must inevitably, he says, involve a kind of hermeneutic circle, that is (as he explains in his critique of prior work in the field of
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