en_tn_condensed/1co/08/01.md

food sacrificed to idols

Gentile worshipers would offer grain, fish, fowl, or meat to their gods. The priest would burn a portion of it on the altar. Paul is speaking of the portion the priest would give back for the worshiper to eat or sell in the market.

Knowledge puffs up

"Knowledge makes people proud" or "People who think that they know a lot become proud"

but love builds up

"but when we love people, we build them up"

love builds up

"love strengthens people" or "when we love people, we strengthen them"