瑜伽論記 4.331

4.331

復次云何建立四無量定下，第三建立無量義中，文分為二：初、釋經四無量行相差別；後、釋無量差別。

From 'Furthermore, how are the four immeasurable concentrations established?' below is the third part, establishing the meaning of the immeasurables, wherein the text is divided into two: first, explaining the distinctions in the aspects of the four immeasurables in the sūtra; second, explaining the distinctions among the immeasurables.