俱舍論頌疏論本 27.107

27.107

從淨自生二者，淨者，善靜慮也。自者，化心也。此能化心，一從淨生、二從自生。又此化心能生二心，謂生淨心及生化心，謂從靜慮起能化心，此心必無直出觀義，且從淨定地起初化心，此後後化心從自類化心生，最後化心還生淨定，故此化心從二心生，能生二心。

Regarding "arising as two from the pure and from themselves": "the pure" refers to wholesome dhyāna; "themselves" refers to the apparition-mind. This mind that produces apparitions arises from two: first, arising from the pure; second, arising from itself. Moreover, this apparition-mind can give rise to two minds: namely, producing the pure mind and producing the apparition-mind. That is, when one emerges from dhyāna to produce the apparition-mind, this mind definitely cannot directly emerge from meditative absorption. First, from the pure stage of concentration, the initial apparition-mind arises; subsequently, later apparition-minds arise from apparition-minds of their own kind; and the final apparition-mind turns back to give rise to the pure absorption. Therefore, this apparition-mind arises from two minds and can give rise to two minds.