1 Corinthians 8:1

Now concerning those things. It appears from this whole passage that the Corinthians had, in a former letter, consulted this apostle, upon the subject of eating meats offered to idols. It was not unusual to reserve some part of the sacrifice of which they made a supper, either in their own family, with their friends, or sometimes even in the temple. Some of the Christians of Corinth attended without scruple at these sorts of feasts, and eat of the meats offered to idols; whilst others, on the contrary, took scandal at this conduct, and thought it a tacit approbation of idolatry. St. Paul being consulted upon this difficulty, gives them his advice in this chapter. (Calmet) --- We know that we all have knowledge about it. That is, all we, who are sufficiently instructed, have knowledge enough to be convinced, that idols are nothing in themselves, nor the meats offered to them better nor worse upon that account. (Witham) --- Knowledge puffeth up, &c. Knowledge, without charity and humility, serveth only to puff persons up. (Challoner)