While this description of the Dhamma is frequently found, it is not elsewhere used as an introduction to a specific teaching.

We have now included the six sense fields, contact, feeling, and craving, which are four of the items of dependent origination.

This is an unusual use of na upapajjati in the sense, “is not tenable”, “does not obtain”, or “is not justified”.

Literally, “With contact as dependency arises what is felt …”

Compare the analysis at SN 36.6.

This is not found in parallel passages and is probably a later addition.