A scholar is like a raven feeding its young that spits out what it has eaten from the mouth.A thinker is like a silkworm which gives us not mulberry leaves, but silk.

• 学者如乌鸦一样吐出口中食物以喂养雏鸟.；思想家如桑蚕给我们的不是桑叶；而是丝