“Unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called to be saints, with all that in every place call upon the name of Jesus Christ our Lord, both theirs and ours:”
King James Version (KJV)
1:2 To the church of God which is in Corinth - St. Paul, writing in a familiar manner to the Corinthians, as also to the Thessalonians and Galatians, uses this plain appellation. To the other churches he uses a more solemn address. Sanctified through Jesus Christ - And so undoubtedly they were in general, notwithstanding some exceptions. Called - Of Jesus Christ, #Rom 1:6| And - As the fruit of that calling made holy. With all that in every place - Nothing could better suit that catholic love which St. Paul labours to promote in this epistle, than such a declaration of his good wishes for every true Christian upon earth. Call upon the name of our Lord Jesus Christ - This plainly implies that all Christians pray to Christ, as well as to the Father through him.
1Co 1:2 Unto the church of God. This designation of the church appears oftener than any other in the New Testament. To them that are sanctified in Christ Jesus. All of "the church of God at Corinth" were "sanctified in Christ Jesus"; that is, they were set apart from the world and consecrated to God. All Christians are "sanctified" in the sense of the term in the New Testament, and "called to be saints". The humblest Christian is a saint, as well as Peter or Paul. With all that in every place. The letter is intended for all Christians, as well as for those at Corinth. Call upon the name of Jesus Christ. Recognize him as their divine Savior. Both theirs and ours. The Lord of the saints everywhere as well as ours (1Co 8:6 Eph 4:5). Since there is only one Lord and Master, all Christians should be brethren.