Zhǐ zhī wǒ wàimiàn xíngzhuàng; nǎ zhī wǒ dù nèi wénzhāng？

只知我外面形狀, 哪知我肚內文章？

Lit One may know [someone's] appearance, [but] how can one know what's in [someone's] mind?

Fig One can never truly know what is in others' hearts or minds.

Note [Rhyme; see also rén dào nánchù and sān nián shí mǎ xìng above.]

Topics APPEARANCES HEARTS LIMITATIONS MINDS rhyme UNDERSTANDING