《淮南子·修务训》
所以孪生兄弟长相一样，也只有当母亲的才能分清；同样，玉和石头，也只有优秀的工匠才能鉴别；书传这样的典籍，也只有圣人能够阐发其中的微言大义。
故夫孪子之相似者，唯其母能知之；玉石之相类者，唯良工能识之；书传之微者，惟圣人能论之。
So although twins look the same, only their mother can tell them apart. Jade and stone look the same, only excellent craftsmen can identify them. Ancient books such as the Book of Poetry and the Book of History can only be explained by saints.
<s>[INST] Highlight and translate the key terms in the Classical Chinese text: 圣人, 石，玉石, 古。Explain their significance in the context of the passage. [/INST]
Key terms and their translations:

圣人 (shèng rén): sage, saint
石 (shí): stone
玉石 (yù shí): jade
古 (gǔ): ancient

Significance in the context of the passage:

圣人 (sage, saint) refers to those who have achieved the highest level of moral cultivation and wisdom. In the passage, it is used to emphasize that only sages are capable of truly understanding and interpreting ancient texts such as the Book of Poetry and the Book of History.

石 (stone) and 玉石 (jade) are used to illustrate the difficulty of distinguishing between things that appear similar. Just as it is difficult to tell the difference between stone and jade based on their appearance alone, it is also difficult to understand the true meaning of ancient texts without the guidance of sages.

古 (ancient) refers to the ancient texts that are the subject of the passage. These texts are considered to be difficult to understand, and only sages are capable of truly deciphering their meaning.

Final English translation:

So although twins look the same, only their mother can tell them apart. Jade and stone look the same, only excellent craftsmen can identify them. Ancient books such as the Book of Poetry and the Book of History can only be explained by saints.</s>
Highlight and translate the key terms in the Classical Chinese text: 圣人, 石，玉石, 古。Explain their significance in the context of the passage.
user
Key terms and their translations:

圣人 (shèng rén): sage, saint
石 (shí): stone
玉石 (yù shí): jade
古 (gǔ): ancient

Significance in the context of the passage:

圣人 (sage, saint) refers to those who have achieved the highest level of moral cultivation and wisdom. In the passage, it is used to emphasize that only sages are capable of truly understanding and interpreting ancient texts such as the Book of Poetry and the Book of History.

石 (stone) and 玉石 (jade) are used to illustrate the difficulty of distinguishing between things that appear similar. Just as it is difficult to tell the difference between stone and jade based on their appearance alone, it is also difficult to understand the true meaning of ancient texts without the guidance of sages.

古 (ancient) refers to the ancient texts that are the subject of the passage. These texts are considered to be difficult to understand, and only sages are capable of truly deciphering their meaning.

Final English translation:

So although twins look the same, only their mother can tell them apart. Jade and stone look the same, only excellent craftsmen can identify them. Ancient books such as the Book of Poetry and the Book of History can only be explained by saints.
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