《贞观政要·卷六·论俭约》
古人曾说： 不做没有益处的事，只挑有益的做。 
古人云： 不作无益害有益。 
The ancients once said: Do nothing that is not beneficial, choose only that which is beneficial.
<s>[INST] Kindly elucidate the central themes in this passage in English: 古人云： 不作无益害有益。  [/INST] The ancients once said: Do nothing that is not beneficial, choose only that which is beneficial.</s>
Kindly elucidate the central themes in this passage in English: 古人云： 不作无益害有益。
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The ancients once said: Do nothing that is not beneficial, choose only that which is beneficial.
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