維摩經玄疏 1.87

1.87

Second, clarifying that using the four siddhāntas gives rise to the shared teaching: with respect to "arising non-arising is ineffable," the Buddha uses the four siddhāntas to respond to persons of the capacities of the three vehicles produced by the Dharma of the ten causal conditions, expounding the shared teaching of the unarisen four noble truths [understood] in terms of illusory transformation to teach persons of the three vehicles. Therefore the Pañcaviṃśatisāhasrikā-prajñāpāramitā Sūtra says: "Those who wish to study the three vehicles should study prajñā," and also says: "Persons of the three vehicles alike sever defilements by means of the ineffable path of paramārtha-satya."