大通方廣懺悔滅罪莊嚴成佛經 2.27

2.27

善男子。復有四法。善開法施。何等為四。一者守護正法。二者自益智慧亦益前人。三者常行善人之法。四者示人垢淨青白。是名為四。

"Good son, there are furthermore four dharmas by which one skillfully opens the giving of the Dharma. What are the four? First, guarding and preserving the true Dharma; second, benefiting one's own wisdom as well as benefiting others; third, constantly practicing the ways of good people; fourth, revealing defilement and purity, dark and bright, to others. These are named the four.