A famous poem about harmony.

We are busy precisely because we can have leisure, and we are engaged in war precisely for peaceful coexistence. Ethics from Aristotle.

Countries on earth live not for faith, but for world peace. From Augustine's kingdom of God.

Harmony is the most important thing, which is the principle of moral practice advocated by Confucianism. From "The Analects of Confucius": "The use of courtesy, harmony is precious". In other words, the function of ceremony lies in its smoothness.