Abstract: In the process of trying to unify the fourfold senses of Being，Heidegger realized step by step that the basic meaning of Being may be that in the sense of truth.For this reason，he paid special attention to the problem of truth in his phenomenological interpretation of Aristotle’s practical philosophy，with the result that the relationship between truth，Dasein and the manifestation of Beings became clear.For Heidegger，the mode of being of Dasein or its logos is distinguished from that of other entities in its role to disclose the Being of Beings.In other words，the unified sense of Being is based on the fact that the Being of all kinds of Being is grasped in the existential understanding of Dasein.

Key words: Aristotle, Brentano, Heidegger, being, dasein