金光明經文句記 4.269

4.269

二、引經證。水性不住者，不守於濕。火從緣生者，既賴緣而生，則不能守其熱性。風性無礙者，以無礙故不能守其動。「一一」下，四大俱無性故，皆入如實之際。前之二教以空為如實，後之二教以中為如實；今取圓中，實際為正。

Second, citing sūtras for confirmation. "The nature of water does not abide": it does not keep to wetness. "Fire arises from conditions": since it arises relying on conditions, it cannot keep to its nature of heat. "The nature of wind is unobstructed": because it is unobstructed, it cannot keep to its motion. From "Each and every..." onward: because the four great elements are all devoid of self-nature, they all enter into the limit of reality. The former two teachings take emptiness as reality, while the latter two teachings take the middle as reality; here we take the perfect middle, using the actual limit [of reality] as primary.