摩訶止觀 5.159

5.159

復次，人根不定，或時迴轉。薩婆多明轉鈍為利；《成論》明數習則利。此乃始終論利鈍，不得一時辯也。今明眾生心行不定，或須臾而鈍，須叟而利，任運自爾，非關根轉，亦不數習。或作觀不徹，因聽即悟；或久聽不解，暫思即決。是故更論轉根安心。若法行轉為信行，逐其根轉，用八番悉檀而授安心。若信行轉成法行，亦逐根轉，用八番悉檀而授安心。得此意，廣略自在說之。轉、不轉，合有三十二安心也。

Furthermore, human faculties are indeterminate, sometimes shifting. The Sarvāstivāda explains transforming the dull into the sharp; the Chengshi lun explains that through repeated habituation one becomes sharp. These discuss sharpness and dullness from beginning to end, and cannot be distinguished at a single moment. Here we explain that the mental conduct of sentient beings is indeterminate: they may be dull in an instant, and sharp in an instant; moving naturally of itself, it is not a matter of faculties transforming, nor of repeated habituation. Or perhaps one does not penetrate while practicing contemplation, but awakens upon listening; or after long listening one does not understand, but upon momentary reflection resolves it. Therefore, we further discuss calming the mind through the transformation of faculties. If Dharma-practice transforms into faith-practice, following the transformation of their faculties, one uses the eight turns of siddhānta to confer calming the mind. If faith-practice transforms into Dharma-practice, also following the transformation of faculties, one uses the eight turns of siddhānta to confer calming the mind. Grasping this meaning, one may explain it extensively or briefly at will. With transforming and non-transforming, there are in total thirty-two ways of calming the mind.