金剛經纂要刊定記 7.202

7.202

故利樂等者。難曰：菩薩不化生，任說如影響。菩薩既化生，云何如影響？

"Therefore benefiting and bringing joy," etc.: An objection states: "If bodhisattvas did not transform and guide sentient beings, one might say they are like reflections and echoes; but since bodhisattvas do transform and guide sentient beings, how can they be like reflections and echoes?"