The allegory of Plato's cave indicates an education that pursues Truth as its essence. The ways to deal with truth also lay the foundation for metaphysics that inquires about Being. However, Being remains forgotten because Heidegger thought metaphysics has confused Being and beings. Under such viewpoint, the representation of beings stands for truth and Being of human being lies in oblivion. The humanism that plays an important role in western education thus becomes the product of traditional metaphysics. Although the humanistic tradition always aims to disclose the glory of humanity, the essence of man is ironically concealed because through definitions like "man as rational creature" based on conceptual thinking for beings the path leading to Being is blocked up. With a view to breaking the ice in metaphysics and letting humanity illuminated anew by the light of Being, Heidegger embarked on writing "Being and Time". Moreover, he dedicated other speeches or articles to instruct a kind of sentimental-grounded attuning thinking which originally springs from Being itself. It would be unjustifiable to take him as an anti-humanist who trod rationality under foot; rather, he in fact exalted the dignity of humanity by a very extraordinary touch.