He who knows most knows best how little he knows什么意思?

He knows most who speaks least He knows a lot who speaks little. who knows most says He who knows only one religion knows none He knows _________ China. He knows ___ China. Who knows most says least He knows how to drive a car.He also knows how to ride a how Who knoWS? who knows many stories什么意思 He knows little Chinese but he likes reading Chinese books.（ knows 什么意思