Why is ”being” present but ”non-being” not present? Out of deep dissatisfaction with traditional metaphysics, Martin Heidegger made radical questions about being. Therefore, the contemplation about ”non-being” became his lifelong career, and such contemplation makes it possible for him to relate to the oriental sages who stressed pratyaksa. However, the metaphysical framework he himself built is still somewhat blurred; therefore, we compare his insights with ”Upanishad” and ”Tao Te Ching” and find out that non-being is the vision he shared with the oriental sages. Ultimately, pure being and pure non-being are one and the same, which had already been revealed by Hegel. The comparison we make in this article is based on the existential visions of oriental and occidental philosophies about non-being in wishes to present ”non-being” more clearly.