The universe is just like a right-angled triangle of standard unit. The two right-angle sides oppose each other and yet also complement each other like quantum entanglement. They superpose and counterbalance each other in a system. They grow and decline, but identically equal to “1”. From this perspective, the Traditional Yin-and-Yang Double Fish Diagram and the core idea behind it is counterbalance and unity of opposites, a geometric expression of “being of beings” and an illustration of the ground of “being”, or the “being” in “being of beings”, the “one” in “one is all”. It roots in the Pythagorean Theorem and goes beyond the Pythagorean Theorem. It illustrates the idea in the Euler Equation:

e^{iθ}·e^{−iθ} =(cosθ + isinθ (cosθ − isinθ) = cos^{2}θ + sin^{2}θ = 1),

and has opened the door of relativity, expressing the key idea of Fuzzy Set in modern mathematics developed in contemporary and modern times. “If each right-angled side multiple itself, the sum will be the square of hypotenuse. The extracted root is hypotenuse”. Thus, the xian (in Chinese meaning either “hypotenuse” or “profound”) is “profound” because we don’t understand the principle and add too much mysterious explanations to it.

This reminds us of the “Needham question”, why didn’t science rise in China? And the emotional sigh of Mr. Liang Shumin, “The Chinese culture is a pre-matured one of mankind.” In a material desire-pursuing physical world, metaphysics is so lonely and with- ering. As Heidegger pointed out, truth is hardly acceptable just because it’s too simple. Facing the rapidly-changing advancement of science, we need inquire with earnestness and reflect with self-practice, and ask ourselves whether we need “lead people to perfection” and “having known where to reset at the end, one will be able to determine the object of pursuit”, and try our best to “return to things themselves”; Facing the cultural flourishing, whether we should keep to the original intention of “speech” and come back to the original point of language.

Facing the complicated world, human beings need another renaissance to search, keep and return to the “1” to create “a community of common destiny”. The philosophical element of traditional Chinese culture and the dialectical unity of Marxism could make continuing contributions to the aim since whether ancient or modern, Chinese or foreign, arts or sciences, they must be “unified” in basic principle of the universe.