法華玄論 1.57

1.57

答：三事示現即是如來三業利物，他心輪謂意業利物、神通輪謂身業利物、說法輪謂口業利物。

Answer: The manifestation of the three matters is precisely the Tathāgata's three karmas benefiting beings: the wheel of reading others' minds means the mental karma benefiting beings; the wheel of supernatural powers means the physical karma benefiting beings; and the wheel of preaching the Dharma means the vocal karma benefiting beings.