大乘起信論義記 3.130

3.130

○於中法喻合，法中但明因緣具成得，略無不具失。喻中偏明不具失，略無具緣得，合中雙明二義，法喻可知。

In this there are the dharma, the metaphor, and the application. The dharma only explains that completion is attained when cause and condition are fulfilled, omitting the failure when they are not fulfilled. The metaphor specifically explains the failure when conditions are not fulfilled, omitting attainment when conditions are fulfilled. The application explains both meanings together. The dharma and the metaphor can be understood.