18 Think about the people of Israel. Weren't they united by eating the sacrifices at the altar? 19 What am I trying to say? Am I saying that food offered to idols has some significance, or that idols are real gods? 20 No, not at all. I am saying that these sacrifices are offered to demons, not to God. And I don't want you to participate with demons. 21 You cannot drink from the cup of the Lord and from the cup of demons, too. You cannot eat at the Lord's Table and at the table of demons, too. 22 What? Do we dare to rouse the Lord's jealousy? Do you think we are stronger than he is?
Matthew Henry's Commentary on 1 Corinthians 10:18-22
Commentary on 1 Corinthians 10:15-22
(Read 1 Corinthians 10:15-22)
Did not the joining in the Lord's supper show a profession of faith in Christ crucified, and of adoring gratitude to him for his salvation ? Christians, by this ordinance, and the faith therein professed, were united as the grains of wheat in one loaf of bread, or as the members in the human body, seeing they were all united to Christ, and had fellowship with him and one another. This is confirmed from the Jewish worship and customs in sacrifice. The apostle applies this to feasting with idolaters. Eating food as part of a heathen sacrifice, was worshipping the idol to whom it was made, and having fellowship or communion with it; just as he who eats the Lord's supper, is accounted to partake in the Christian sacrifice, or as they who ate the Jewish sacrifices partook of what was offered on their altar. It was denying Christianity; for communion with Christ, and communion with devils, could never be had at once. If Christians venture into places, and join in sacrifices to the lust of the flesh, the lust of the eye, and the pride of life, they will provoke God.