大方廣圓覺修多羅了義經略疏 1.789

1.789

即於根塵，不取發識牽心之義，直取四大之體也。《寶積經》說四大各二，謂內及外。地界二者，內謂自他身，內所有堅者，謂髮毛等；外謂身外所有堅者，謂土木等。水界二者，身內潤性，淚、汗等；身外潤性，雨、露等。火界二者，身內熱體、熱相能消飲食等；身外熱體、熱相能成熟等。風界二者，身內風體，風名速疾，住四支等；身外風體，動轉等。

Directly in relation to the faculties and dusts, without taking the meaning of generating consciousness or pulling the mind, one directly takes the substance of the four great elements. The Ratnakūṭa-sūtra says that each of the four great elements is twofold, namely internal and external. The two of the earth element: internal refers to the solid parts within the bodies of oneself and others, namely hair, nails, and so forth; external refers to the solid parts existing outside the body, namely soil, wood, and so forth. The two of the water element: the moist nature inside the body, tears, sweat, and so forth; the moist nature outside the body, rain, dew, and so forth. The two of the fire element: the hot substance and hot mark inside the body capable of digesting food and drink, etc.; the hot substance and hot mark outside the body capable of ripening crops, etc. The two of the wind element: the wind substance inside the body—wind is named 'swift,' abiding in the four limbs, etc.; the wind substance outside the body, moving, turning, etc.