華嚴經探玄記 17.17

17.17

四互收攝者，有四重：一以位收位，六位之內一一各收一切位故，是故一位即具二千，為萬二千也。上云「在於一地普攝一切諸地功德」，此之謂也。二以門收門，即二百門中一一各收一切門故，即成二百箇二百，為八萬行也。三以行收行，即二千行內一一各攝一切行故，即成二千箇二千也。過億兆，名等也。四以略攝廣，如此所說二千行等，下頌結云「如大地一塵之說」也。以此一塵之略說，不離十方之廣地，是故攝廣亦無不盡。此乃等無極之法界、超無際之虛空，下云「虛空可度量，菩薩德無盡。」斯之謂也。

Fourth, mutual gathering and subsumption: there are four levels. First, gathering stages by stages: because within the six stages, each one gathers all stages, therefore a single stage is endowed with two thousand, making twelve thousand. The earlier statement, "Dwelling on one bhūmi, it universally gathers the virtues of all bhūmis," refers to this. Second, gathering approaches by approaches: because within the two hundred approaches, each one gathers all approaches, this forms two hundred times two hundred, making forty thousand practices. Third, gathering practices by practices: because within the two thousand practices, each one encompasses all practices, this forms two thousand times two thousand. Exceeding billions and trillions, they are termed equal [to the dharmadhātu]. Fourth, gathering the broad through the brief: regarding the two thousand practices and so forth taught like this, the verse below concludes, "Like an exposition of a single speck of dust of the great earth." Because this brief exposition of a single speck of dust is not separate from the broad earth of the ten directions, in gathering the broad there is likewise nothing not exhausted. This is equal to the limitless dharmadhātu and transcends boundless space, as stated below: "Space might be measured, but a bodhisattva's virtues are inexhaustible." This refers to this.