Behold Israel after the flesh: are not they which eat of the sacrifices partakers of the altar? Behold Israel after the flesh - The Jews not yet converted to Christianity: the latter being Israel after the Spirit. As the design of the apostle was to withdraw his converts at Corinth from all temptations to idolatry, he produces two examples to show the propriety of his endeavors.
1. All who join together in celebrating the Lord's Supper, and are partakers of that one bread, give proof by this that they are Christians, and have fellowship with Christ.
2. All the Israelites who offer sacrifice, and partake of those sacrifices, give proof thereby that they are Jews, and are in fellowship with the object of their worship: so they who join in idol festivals, and eat things which have been offered to idols, give proof that they are in communion with those idolaters, and that they have fellowship with the demons they worship.