Meaning of the Idiom
li bu cong xin（unable to do as much as one would like to）
Ban Chao, was one of the greatest diplomatists in the history of China. He led 36 warriors conquered and pacified over 50 countries in the Western Region of Han Empire and defeated the powerful Kushan Empire’s invasion.
Many years later, Ban Chao was sick, so he pleaded to come back to his hometown.
His litter sister Ban Zhao, now an influential female politician, also wrote to emperor to summon him back. In the letter, she mentioned that, as Lao Wang is advanced in years, he is not able to work as he would have liked to do.
After Ban Chao finally came back to the Han Empire, he was highly respected and achieved countless honors. He died a year later, at the age of 71.
力不从心
lì bù cóng xīn，指心中想做某事而力量达不到或无力去做。
出自《后汉书·西域传》。
例句
年纪渐大，想要做的事还很多，但常感到力不从心。
如今，我们工作十分忙，要想多照顾一下父母，却又力不从心。
真抱歉！不是不肯帮忙，实在力不从心。
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