摩訶止觀 1.107

1.107

若見如來與諸神變無二無異，如來作神變、神變作如來；無記化化、化復作化，不可窮盡，皆不可思議，皆是實相而作佛事。願我得佛，齊聖法王（云云）。

If one sees that the Tathāgata and his various spiritual transformations are not two and not different—the Tathāgata performs the spiritual transformations, and the spiritual transformations perform the Tathāgata; neutral transformations transform again, and transformations further produce transformations, inexhaustible and entirely inconceivable, all being the true reality performing the Buddha's work—[such a person vows:] "May I attain Buddhahood and equal the holy Dharma King!" and so forth.