The Gateless Gate, by Ekai, called Mu-mon, tr. Nyogen Senzaki and Paul Reps , at sacred-texts.com
"Seijo, the Chinese girl," observed Goso, "had two souls, one always sick at home and the other in the city, a married woman with two children. Which was the true soul?"
Mumon's comment: When one understands this, he will know it is possible to come out from one shell and enter another, as if one were stopping at a transient lodging house. But if he cannot understand, when his time comes and his four elements separate, he will be just like a crab dipped in boiling water, struggling with many hands and legs. In such a predicament he may say: "Mumon did not tell me where to go!" but it will be too late then.