大般涅槃經義記 6.321

6.321

就初段中，如來先教，後阿闍世領解生性。如來教中，先明觀益，「若不繫」下明不觀損。益中有四：一教觀身、二明觀益、三教觀心、四明觀益。

In the first section, the Tathāgata first teaches, and afterwards Ajātaśatru comprehends and gives rise to [shame]. In the Tathāgata's teaching, he first clarifies the benefits of contemplation; from "if one does not fasten [the mind]" onward, he clarifies the detriments of non-contemplation. Among the benefits there are four: first, he teaches contemplation of the body; second, he clarifies the benefits of [such] contemplation; third, he teaches contemplation of the mind; fourth, he clarifies the benefits of [such] contemplation.