《新唐书·列传·卷四十九》
姚崇劝天子不追求边功，宋瞡不肯赏赐边臣，而天宝年间的变乱，终于遭受边臣所害。
崇劝天子不求边功，璟不肯赏边臣，而天宝之乱，卒蹈其害，可谓先见矣。
Yao Chong advised the emperor not to pursue military achievements on the border, Song Lu refused to reward the border officials, and during the Tianbao years the turmoil finally suffered from the border officials.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 崇劝天子不求边功，璟不肯赏边臣，而天宝之乱，卒蹈其害，可谓先见矣。 [/INST] Yao Chong advised the emperor not to pursue military achievements on the border, Song Lu refused to reward the border officials, and during the Tianbao years the turmoil finally suffered from the border officials.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 崇劝天子不求边功，璟不肯赏边臣，而天宝之乱，卒蹈其害，可谓先见矣。
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Yao Chong advised the emperor not to pursue military achievements on the border, Song Lu refused to reward the border officials, and during the Tianbao years the turmoil finally suffered from the border officials.
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