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:
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Paul writes to the church as a whole, because at that time leaders had not yet been appointed for individual churches. He censures them for many things, but in spite of that he still says that they have been sanctified. However, they later began to behave badly, so that although the whole church was sanctified in Christ, some members of it had been deflected from the truth by the wicked teaching of the false apostles. The Corinthians were called to be saints, which means that they could not deviate from the narrow path of sanctification. Paul linked them, as Gentiles, with the true Jews, because salvation is of the Jews, so that wherever there are Gentiles who call on the name of the Lord Jesus Christ and wherever there are true Jews, both are united in him. But the false apostles, who preached the name of Christ in accordance with the wisdom of this world, criticized the law and the prophets. Like Marcion and Mani, they maintained that Christ was not really crucified but that it merel...
The church ought to be united because it belongs to God. It does not exist only in Corinth, but all over the world, and it is one, for the church’s name (ekkl&#;sia) means “assembly.” It is not a name of separation, but a name of unity and concord.