淨名經集解關中疏 2.22

2.22

"'Why is this? A bodhisattva enters saṃsāra for the sake of sentient beings; where there is saṃsāra, there is illness. If sentient beings are able to be freed from illness, then the bodhisattva will have no more illness'"—this is the explanation. Sengzhao says: "The dharmakāya is without birth, how much less could it have a physical form? Since it has no form, from what cause could illness arise? Yet taking birth for their sake, he cannot be without form; having a form, he cannot be without affliction. Therefore, in accordance with the duration [of their illness], he shares the same illness with them. If they are freed from illness, the bodhisattva will have no more illness."