In this paper I explore the issues of authenticity and Mitsein in Heraclitus (535-475 B.C.) and Confucius (551-479 B.C.) by addressing their thought of the harmony of the opposites. Since Heraclitus and Confucius elevated a virtue of hearing/attunement over that of seeing/understanding, their thought of harmony can uplift the limits of historical viewpoints and meanings, and reach over us in the intimacy of our earshot. And we can also understand their thoughts as an attempt to establish an intercultural dialogue between East and West.