妙法蓮華經玄義 5.37

5.37

若十四般若，合三十心為三般若，開十地為十般若，就等覺為十四般若，皆是因位；轉入薩婆若，即是果位。是為合前開後，以明圓位。若四十二字門，即是初後俱開，以明圓位。若天雨四華，表開、示、悟、入；遊於四方者，此即前後俱合。諸經開合不同，皆是悉檀方便，而圓位宛然矣。

If we take the fourteen prajñās: combining the thirty minds into three prajñās, opening the ten grounds into ten prajñās, and adding equal enlightenment to make fourteen prajñās, these are all causal stages; turning and entering sarvajñā is the fruition stage. This is combining the former and opening the subsequent to clarify the stages of the perfect teaching. If we take the gate of the forty-two syllables, this is opening both the initial and the subsequent to clarify the stages of the perfect teaching. If we take the gods raining down the four flowers, signifying opening, revealing, awakening, and entering, or roaming through the four quarters, these are both combining the initial and the subsequent. The differences in opening and combining across the sūtras are all the skillful means of the siddhāntas, yet the stages of the perfect teaching remain fully evident.