en_tn_condensed/jas/02/16.md

stay warm

This means either "have enough clothes to wear" or "have a place to sleep." (See: rc://en/ta/man/translate/figs-metonymy)

be filled

The thing that fills them is food. This can be stated explicitly. Alternate translation: "be filled with food" or "have enough to eat" (See: rc://en/ta/man/translate/figs-explicit)

for the body

to eat, to wear, and to live comfortably (See: rc://en/ta/man/translate/figs-metonymy)

what good is that?

James uses a rhetorical question to teach his audience. Alternate translation: "that is not good." (See: rc://en/ta/man/translate/figs-rquestion)