Words of the apostle Paul: Come out from among unbelievers, and separate yourselves from them, says the LORD. 2 Corinthians 6:17

With Paul's arrival in Athens and Corinth, the confrontation between the Christian faith and the paganism began to gain importance; this is why Paul began to write his famous letters from this point onward. Paul spent a long time in Corinth, that is why the founding of the church in that city was one of his most important achievements as a missionary of the faith. And so, while in Ephesus, during his third missionary journey, he wrote the First Epistle to the Corinthians. The second epistle to this Church, however, was written, as he himself relates in 2 Corinthians 2:12, after having passed through Troas at the end of his third missionary journey.
And the Second Letter to the Corinthians, because of its subject matter, seems more focused on affirming the authority of the apostle as preacher of the Church than on confronting dangerous heresies. The apostle's words seem to describe a time when there was no defined theology or unified catechesis, but rather an era in which every self-proclaimed teacher of the faith had his own gospel of the Lord.
And among the teachings of the apostle Paul in his Second Epistle to the Corinthians, one stands out concerning the relationship that Christians should have with pagans. This is why the apostle wrote: "Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common?" 2 Corinthians 6:14. And then Paul concluded with these words: "Come out from among unbelievers, and separate yourselves from them, says the LORD" 2 Corinthians 6:17.
And with this, Paul taught that Christians, by the grace of the Holy Spirit, are called to a new citizenship, heavenly citizenship, as opposed to worldly citizenship, something to which the apostle also alluded in his letter to the Philippians. With this, Paul, in more practical terms, called on Christians to be careful in their relationship with pagans, because the pagans, by their heresies, that is, the practice of error, were condemned to their own ruin. In his evangelistic message, Paul called for a new lifestyle, which made Christians live as strangers in a world given over to error. The righteous life proclaimed by Paul clashed with the pagans, and so Christians were often viewed with suspicion.
Two thousand years after Paul wrote his second epistle to the Corinthians, his words still resonate powerfully, constantly inspiring Christians.

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