大乘百法明門論開宗義決 1.4

1.4

依本後智發深慈悲等者。由根本智得生同體。起後得智見苦生悲。同體智悲是為深矣。此悲與智菩薩所行。依斯造論是依妙行。

Regarding "Generating deep compassion based on the fundamental and subsequently attained wisdoms, etc.": Due to the mūla-jñāna, identity of substance is generated; arising the pṛṣṭha-labdha-jñāna, seeing suffering, compassion is generated. Identical-in-substance wisdom and compassion is truly deep! This compassion and wisdom are the bodhisattva's practice. Composing the treatise based on them is relying on wondrous practice.