heyaṃ duḥkham anāgatam //2.16//
tad etac chāstraṃ caturvyūham ity abhidhīyate --- heyaṃ duḥkham anāgatam/ anāgatam ity atītavartamāne 78 vyavacchinne/ tatropapattim āha --- duḥkham atītam iti/ nanu vartamānam upabhujyamānaṃ na bhogenātivāhitam iti kasmān na heyam ity ata āha --- vartamānaṃ ceti/ sugamam //2.16//