《晋书·列传·第六章》
悲愤感慨，因此写信示意。 
悲愤感慨，故以示意。 
Sad and感慨, so write a letter to show it.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 悲愤感慨，故以示意。  [/INST] Sad and感慨, so write a letter to show it.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 悲愤感慨，故以示意。
user
Sad and感慨, so write a letter to show it.
assistant