What Does 1 Corinthians 10:18 Mean?

Behold Israel after the flesh: are not they which eat of the sacrifices partakers of the altar?—Paul introduces a third example (after Christian communion and pagan temple meals): Jewish sacrificial worship. Israel after the flesh (ton Israēl kata sarka, τὸν Ἰσραὴλ κατὰ σάρκα) distinguishes ethnic Israel from spiritual Israel (the church). Paul appeals to what Corinthians would know about Jewish practice: those who eat of the sacrifices become partakers of the altar (koinōnoi tou thysiastēriou, κοινωνοὶ τοῦ θυσιαστηρίου).

In Levitical worship, certain sacrifices (peace offerings, thanksgiving offerings) were partially consumed by worshipers (Leviticus 7:15-18). Eating consecrated meat established covenant fellowship with God whose altar sanctified the sacrifice. The altar represents God's presence and acceptance of worship. To eat the sacrifice was to participate in worship of the God of Israel.

Paul's logic builds: (1) The Lord's Supper creates fellowship with Christ. (2) Jewish sacrificial meals create fellowship with God at His altar. (3) Therefore, pagan sacrificial meals create fellowship with whatever spiritual reality stands behind the idol (v. 20). The principle is consistent: eating consecrated food is never spiritually neutral—it always establishes covenant fellowship with the deity honored. This makes idol-temple dining far more serious than mere social convention.