A person is born with desires of the eyes and ears, and a liking for beautiful sights and sounds. If he gives way to them, they will lead him to immorality and lack of restriction, and any ritual principles and propriety will be abandoned.
Xunzi was a Chinese philosopher who contributed to one of the Hundred Schools of Thought. Xunzi believed man's inborn tendencies need to be curbed through education and ritual.
His philosophy has a pragmatic flavour compared to Confucian optimism. Some scholars attribute it to the divisive times. Xunzi was one of the most sophisticated thinkers of his time, and was the teacher of Li Si and Han Fei Zi.