Being is not something like a being. Being, Heidegger claims, is what determines beings as beings, that in terms of which beings are already understood. Heidegger is seeking to identify the criteria or conditions by which any specific entity can show up at all. If we grasp Being, we will clarify the meaning of being, or sense of being, whereby sense Heidegger means that in terms of which something becomes intelligible as something.
According to Heidegger, as this sense of being precedes any notions of how or in what manner any particular being or beings exist, it is pre-conceptual, non-propositional, and hence pre-scientific. Thus, in Heideggers view, fundamental ontology would be an explanation of the understanding preceding any other way of knowing, such as the use of logic, theory, specific ontology or act of reflective thought.
At the same time, there is no access to being other than via beings themselves”hence pursuing the question of being inevitably means asking about a being with regard to its being. Heidegger argues that a true understanding of being 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 hermeneutics, it must rely upon repetitive yet progressive acts of interpretation.
Thus, Heidegger also conceptualized that being with time prior of having that time alone. This means that we cant have time by simply telling that time exists but we also need to have that sense of being or the individual being to say that time really exist. Time in other hand, makes a history because of that sense of being which Heidegger rely on with his work of the Time and Being.