John Wesley on 1 Corinthians 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.