《庄子·内篇·齐物论》
南郭子綦靠着几案坐着，仰起头向天缓缓地吐着气，那离神去智的样子真好像精神脱离了躯体，进入了忘我境界。他的学生颜成子游侍立在前，说道： 您这是怎么了？
南郭子綦隐机而坐，仰天而嘘，嗒焉似丧其耦。颜成子游立侍乎前，曰： 何居乎？
Nan Guo Ziqi sat against the table, looked up at the sky and breathed out slowly, his look of leaving the mortal world and rising to heaven was like his spirit leaving his body and entering the realm of self-forgetfulness. His student Yan Chengzi You stood before him and said: What's wrong with you?