無量壽經優婆提舍願生偈註 2.125

2.125

夫眾生為別報之體、國土為共報之用，體用不一，所以應知。然諸法心成，無餘境界，眾生及器復不得異、不得一，不一則義分、不異同清淨。器者用也，謂彼淨土是彼清淨眾生之所受用，故名為器。如淨食用不淨器，以器不淨故食亦不淨。不淨食用淨器，食不淨故器亦不淨。要二俱潔乃得稱淨，是以一清淨名必攝二種。

Sentient beings are the substance of individual karmic retribution, while the land is the function of shared karmic retribution. Substance and function are not one; therefore 'one should know.' However, all dharmas are created by the mind and there is no external realm beyond it. Sentient beings and the vessel again can neither be different nor be one. If they are not one, their meanings are distinguished; if they are not different, they are identical in purity. 'Vessel' means function; it means that that pure land is that which is experienced and used by those pure sentient beings, and is therefore called a vessel. Just as when pure food is placed in an impure vessel, the food also becomes impure because the vessel is impure; and when impure food is placed in a pure vessel, the vessel also becomes impure because the food is impure. Both must be clean for it to be termed pure. For this reason, the single name 'purity' necessarily subsumes both kinds.