画地为牢

Origin and story

In his Letter in Reply to Ren An, preserved in the Wen Xuan (文选), Sima Qian reflects on disgrace, punishment, and the standards traditionally expected of an honorable man. He evokes an extreme saying: such a man would refuse even to enter a prison merely marked out on the ground, or confront an official represented by a wooden figure. The imaginary prison emphasizes aversion to humiliation; it is not an account of a man who accidentally became trapped inside a circle.

The image later acquired a broader meaning. A boundary that exists because someone has drawn or accepted it can become a prison of restrictions. Modern usage therefore includes arbitrarily confining others or unnecessarily limiting oneself.