首楞嚴義疏注經 4.442

4.442

"Ānanda! What is called the world of sentient beings? 'Shi' is flux and flow, and 'jie' is spatial direction. You should know now that east, west, south, north, southeast, southwest, northeast, northwest, above, and below are the boundaries (jie); past, future, and present are the eras (shi). The spatial directions are ten, and the count of the flow is three. All sentient beings weave delusion together, shifting and moving within their bodies, so that the world [and eras and directions] interpenetrate."