《资治通鉴·唐纪·唐纪四十八》
大概其中必有原故，你最好查明此事。 
殆必有故，卿宜察之。 
There must be a reason for it, you'd better investigate this matter.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 殆必有故，卿宜察之。  [/INST] There must be a reason for it, you'd better investigate this matter.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 殆必有故，卿宜察之。
user
There must be a reason for it, you'd better investigate this matter.
assistant