起信論疏筆削記 8.5

8.5

'This reveals…' and so forth is the second, eliminating confusion. It is like saying that waves exist in reliance on water, the intent being to show that the water that is relied upon entirely arises to become the waves that rely; it is not like a child existing in reliance on a mother, where the mother does not entirely become the child, because subject and object are distinct. Thus, this is a vertical discussion adducing a single dharma, not a horizontal explanation regarding two dharmas. 'Because of this…' and so forth brings forth the reason. Because it is the real that is relied upon that arises to become the deluded that relies, there can be the two meanings of enlightenment and non-enlightenment. Because there are these two meanings, the three greatnesses within the meaning of enlightenment are then revealed by means of the deluded dharma of non-enlightenment. Just as after water has arisen to become waves, motion and wetness are both fully present; because motion and wetness are present, one can then reveal the wetness by means of the motion. If one were to say that a child exists in reliance on a mother, the mother is not within the child; because she is not within, one cannot reveal the mother by means of the child. 'Therefore…' and so forth concludes and establishes that the above meaning of that which is relied upon is precisely the tathāgatagarbha.