Christian life: You must not associate with anyone who claims to be a brother or sister but is sexually immoral or greedy. 1 Corinthians 5:11

Paul's arrival in Greece during his second missionary journey was full of difficulties, just arrived in this pagan country, in the city of Philippi he was imprisoned along with Silas, and in the cities of Thessalonica and Berea, he suffered persecution, having to leave these cities hastily.
But it was in Corinth, a prosperous Greek city famous for its cosmopolitan port, where Paul managed to settle for more than a year and calmly preach the gospel. For this reason, the apostle Paul never forgot Corinth, and for its important Christian community, Paul dedicated two beautiful epistles to it.
Paul wrote his letters with a very specific purpose, to encourage the early Christians in the faith, to teach about the importance of the Christian life, and to warn them against the teaching of the error, that is, heresy.
Paul wisely taught in the first epistle to the Corinthians how righteousness ("Do to others what you would have them do to you" Matthew 7:12) and sin are opposed to each other, and that in the face of this opposition, men have the freedom to choose. The life in God's grace is a requirement, and those who do not live their faith according to it are not true Christians, Paul stated. According to Paul's teachings, imitating and emulating Christ is a commitment to change the world.
That is why Paul wrote that those who do not follow the righteousness of Christ are not part of the communion of believers, that is, the union of all believers with Jesus as head:
"I wrote to you in my letter not to associate with sexually immoral people—not at all meaning the people of this world who are immoral, or the greedy and swindlers, or idolaters. In that case you would have to leave this world. But now I am writing to you that you must not associate with anyone who claims to be a brother or sister but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people" 1 Corinthians 5:9-11.

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