金剛經纂要刊定記 2.222

2.222

然此論明本覺心體性離諸念。今此引釋果佛者，以果佛之體即是本覺、元自離念，因果雖分離念無別，故以本覺離念即是佛體。故經云：「大乘因者諸法實相」等。是故在纏名本覺，出纏名究竟覺，始終體一更無別法。故論云：「即是如來平等法身，依此法身說名本覺。」

Now this treatise clarifies that the mental entity of original enlightenment is by nature free from all thoughts. That it is cited here to explain the result-stage Buddha is because the entity of the result-stage Buddha is precisely original enlightenment, fundamentally free from thoughts by nature. Although cause and result are distinguished, being free from thoughts is without distinction; therefore, original enlightenment free from thoughts is precisely the Buddha's entity. Thus the sūtra says: "The cause of the Great Vehicle is the dharmatā of all phenomena," and so on. Therefore, when in bondage it is called original enlightenment; when out of bondage it is called ultimate enlightenment. The entity is one from beginning to end, with no other phenomenon. Hence the treatise says: "It is precisely the Tathāgata's equal Dharma body; relying on this Dharma body, it is termed original enlightenment."