鑒往知來

jian4 wang3 zhi1 lai2

to observe the past to foresee the future (idiom, taken loosely from Book of Songs); studying ancient wisdom gives insight into what is to come

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鑒往知來|鉴往知来 [jiàn wǎng zhī lái] ► to observe the past to foresee the future (idiom, taken loosely from Book of Songs); studying ancient wisdom gives insight into what is to come