說無垢稱經疏 1.33

1.33

問：觀此化處，實乃穢方。梵王何以言我見此土由來淨也？答：令彰佛慈悲，化標穢處，理實菩薩所見但住淨方。淨穢由于二心，根報化起於凡聖，變佛非定准，處亦可知。不可淨穢雙彰，但標一化之處，義准三土，亦不相違。以佛定土，理誠可悉。

Question: Looking at this place of transformation, it is truly an impure realm. Why did the Brahmā king say, 'I see this land has always been pure'? Answer: It is to make manifest the Buddha's compassion; the transformation is marked in an impure place, while in truth what the bodhisattvas see is only dwelling in a pure realm. Purity and impurity stem from two minds; roots, retribution, and transformation arise according to ordinary beings and sages. The transformed Buddha is not fixed, and the place can also be understood in this way. One cannot manifest both pure and impure simultaneously; only one place of transformation is marked. Analogizing the meaning to the three lands is also not contradictory. Since the Buddha's defined land is so, the principle can truly be understood.