The notion “one hundred Dharma-realms and a thousand Suchnesses”
(Pai-chieh Ch ‘ien-ju) results from the interpenetration among the Ten Dharma-realms, and between the Ten Dharma-realms and the Ten Suchnesses. Since each of the ten realms is said by Chih-i to embrace the other nine realms, with the interpenetration among the ten realms, they result in one hundred realms. Since each of the ten realms is said by Chih-i to embrace the Ten Suchnesses, with the interpenetration among the ten realms, there is a result of one thousand suchnesses. (Page 144)