妙法蓮華經玄義 3.127

3.127

Regarding the round three wisdoms: the contaminated is precisely conditioned dharmas, which are empty, provisional, and the middle; the uncontaminated is also provisional and the middle; the neither-contaminated-nor-uncontaminated is also empty and provisional. One dharma is precisely three dharmas, and three dharmas are precisely one dharma; one wisdom is precisely three wisdoms, and three wisdoms are precisely one wisdom. Wisdom is precisely the object, and the object is precisely wisdom, thoroughly interfused without obstruction. How could such three wisdoms be identical to the previous? The Mahāprajñāpāramitopadeśa says: 'The three wisdoms are attained in a single mind'—without before or after; it is merely to explain it to people and make it easy to understand that it is spoken of under the names of three wisdoms. This is precisely that meaning (and so forth).