維摩經玄疏 6.115

6.115

First, explaining the provisional and ultimate for converting others: The three truths seen by the buddhas and bodhisattvas cannot be spoken of or demonstrated to ordinary beings. Speech that conforms to the minds of others is entirely provisional; here the ultimate is clarified with reference to the provisional. This entails tens of thousands of kinds of the two knowledges, responding differently according to capacities through the four siddhāntas. The various masters did not properly understand the intention behind these two knowledges, and adopting whatever two knowledges were clarified in the sūtras and treatises, they employed them and engaged in obstinate disputations.