It means: imperfection is imperfection.

This is from Xun Qing's "Xunzi, Encourage Learning", the first paragraph of which is as follows:

A gentleman knows that her husband is not perfect and can't think of beauty, so he recites it consistently and thinks it over, so as to treat others and educate people. Let eyes don't want to see, mouth don't want to say, and heart don't want to worry. When you are good at time, your eyes are good with five colors, your ears are good with five tones, your mouth is good with five flavors, and your heart benefits the world. Therefore, rights cannot be dumped, the masses cannot be moved, and the world cannot be shaken. Life depends on reason, death depends on reason, and husband is called virtue. Fuck, then you decide, then you decide, then you respond. If a husband can respond positively, he is an adult. The sky sees its light and the earth sees its light, and the gentleman values all this.