It was Laozi who put forward the idea of "Great Voices and Happy Sounds".

"Great Voices and Good Voices" comes from Chapter 41 of the Moral Classics in the next chapter of Laozi.

"Staff sergeant hears the Tao and can do it diligently; The sergeant heard that if you survive, you will die; The corporal heard this and laughed. Laughter is not enough. Therefore, there is a saying in the advice: Ming Dow is ignorant, entering the Tao is retreating, yi Tao is like a class, he is virtuous as old, he is humiliated as white, he is full of virtue as insufficient, Jiande is stolen, his quality is as real as Chongqing, he is generous and has no corner, he is a late bloomer, he is a great singer, and the elephant is invisible. Tao is hidden and nameless. The husband only knows the way, and he is good at beginning and success. "

The starting point and final destination of this paper are "Tao". Laozi demonstrates his dialectical view of emptiness, quietness, inaction and complementation of opposites through three levels. The first level is the literal meaning of words with opposite meanings: "Ming Dow is ignorant, entering the Tao is retreating, and yi Tao is like a class" and uses "Ming-ignorance, advancing-retreating, and yi-class".

The second level is discussed from the aspects of human virtue and quality: "Virtue is as old as it is, shame is as white as it is, virtue is insufficient, virtue is like stealing, and quality is as real as Chongqing".

The third level is discussed from the aspects of sound artifacts and space-time of the universe: "There is no corner in generosity, a great achievement is late, and the elephant is invisible." From this, it can be seen that "Great Voices and Happy Voices" together with other contents constitute the content of Laozi's dialectical view, which is a parallel aspect. In the book Tao Te Ching, the definition of "great voice and happy voice" is "the loudest voice can't be heard".