Being and Time Time" with "a sense of shock". Sartre's existentialism has been described as "a version and variant of the idiom and propositions" in "Being and Time". Because of Heidegger's revival of the question of being, "Being and Time" also influenced other philosophers of Sartre's generation, and it altered the course of French philosophy. Maurice Merleau-Ponty argued in "Phenomenology of Perception" (1945) that "Being and Time", "springs from an indication given by Husserl and amounts to no more than an explicit account of the 'natürlicher Weltbegriff' or the 'Lebenswelt' which Husserl, towards the end of his life, identified as the central theme
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