Paul, in greeting the Corinthians in his first epistle to the church there, identifies himself as an “apostle of Jesus Christ through the will of God.” This was his common greeting, necessitated by the Judaizers who constantly attacked his legitimacy as an ambassador of the Lord.
The letter is written to “the church of God which is at Corinth.” This is not a proper name for the church, but rather a phrase designating ownership. The church belongs to God. The church consists of those who have been called out of the world, separated through the shed blood of Jesus Christ. As such, it is proper only to refer to it as belonging to God, or Jesus (cf. Romans 16:16).
The Greek word ekklesia, from which the English term “church” derives, denotes sanctification. The church is called out, or separated from the world. This is accomplished when an individual, by calling “on the name of Jesus Christ”, is cleansed from sin. He is reconciled to God, and is rightly called a saint. This sanctification, as pointed out here by Paul, is accomplished in Jesus Christ. His sacrifice makes us holy, and separates us from the world.
