金光明最勝王經疏 1.35

1.35

二、依理者，〈三身品〉云「由三淨故名極清淨：一煩惱淨、二苦淨、三相淨。譬如真金鎔銷冶鍊，既燒打已無復塵垢，為顯金性本清淨故，金體清淨非謂無金。」乃至云「為顯佛性本清淨故，非謂無體。」此喻理也。真如本有、自性清淨，障隱不現、離障時顯，非始有淨。以真如理勝故，如王為依持故有餘功德。

Second, regarding [explaining] according to principle: the "Three Bodies Chapter" says: "Due to three purifications, it is called ultimate purification: first, purification of afflictions; second, purification of suffering; third, purification of marks. For example, when true gold is melted, smelted, and refined, after being fired and beaten it has no more dirt or defilement; this is to reveal that the nature of gold is fundamentally pure, and that the substance of gold is pure does not mean there is no gold." It further says: "This is to reveal that buddha-nature is fundamentally pure, not that there is no substance." This metaphorises principle. Tathatā is fundamentally existent and pure by self-nature; when concealed by obstacles it does not appear, and when separated from obstacles it is revealed—it is not newly emergent purity. Because the principle of tathatā is supreme, like a king serving as a support, there are remaining virtues.