《新唐书·列传·卷一百一十》
走到半路，郑畋心里惭愧，就称病辞职。
既半道，内惭负，即辞疾。
Zheng Tian felt ashamed on his way there and asked to resign due to illness.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 既半道，内惭负，即辞疾。 [/INST] Zheng Tian felt ashamed on his way there and asked to resign due to illness.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 既半道，内惭负，即辞疾。
user
Zheng Tian felt ashamed on his way there and asked to resign due to illness.
assistant