Although there is a saucer, the jade is rough and polished, and it is also selected from the Book of Rites. Talk about their similarities and differences in content.

Both are analogies. The former uses the metaphor of "although there is good food, I don't know its use" and "although there is a way, I don't know its goodness"; The latter uses the metaphor of "jade is uncut and abrasive" to mean "people don't learn but don't know"

[Difference]

The emphasis of analogy is different. The former means that only practice can produce true knowledge; The latter metaphor is that people can only become talents after being honed.