楞伽阿跋多羅寶經註解 3.64

3.64

“What is the characteristic of teaching penetration? It refers to expounding the various doctrinal teachings of the nine divisions, free from characteristics such as identity and difference, existence and nonexistence, using skillful means to accord with sentient beings and preaching the Dharma as appropriate so that they attain deliverance. This is called the characteristic of teaching penetration. Mahāmati, you and the other bodhisattvas should practice and train in this.”