1 Corinthians 10:29

Conscience, I say, not thine own, but of the other: for why is my liberty judged of another man's conscience? (KJV)

Then: So what should the poor Corinthian do? He was invited to eat and does not want to offend the host, when low and behold, a fellow believer shows up too. Unfortunately, that believer is weak-minded in regards to eating idol meat. Should the Corinthian eat or not? After all, what's going on is a matter of personal conscience and rights. Paul says, "You have to think about the other guy's conscience." N. T. Wright (p. 137) and Thistleton (p. 489) both bring in Paul's view that all should be done to the glory of God. It's not really a matter of eating or not eating.

Now: When Christians face a dilemna of doing something which will offend or weaken the faith of a fellow believer, they must consider who would receive glory if they indulge in the practices of their personal rights. If God, then there is no problem. If not, then personal rights have to be abandoned. If God, salvation, or spiritual growth is not involved in the decision, then the believer is free to exercise personal rights.

Extra source: The First Epistle to the Corinthians: a commentary on the Greek text by Anthony C. Thiselton (Authentic Media, c2000) online at 717http://books.google.com/books?id=IHG_DNLpmroC&dq=1st+Corinthian+commentaries&printsec=frontcover&source=in&hl=en&ei=W9fQSpC1GILplAfHiumoCg&sa=X&oi=book_result&ct=result&resnum=11&ved=0CB8Q6AEwCg#v=onepage&q=&f=false