1It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles, that one has his father’s wife. 2You are arrogant, and didn’t mourn instead, that he who had done this deed might be removed from among you. 3For I most certainly, as being absent in body but present in spirit, have already, as though I were present, judged him who has done this thing. 4In the name of our Lord Jesus Christ, when you are gathered together with my spirit with the power of our Lord Jesus Christ, 5you are to deliver such a one to Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
6Your boasting is not good. Don’t you know that a little yeast leavens the whole lump? 7Purge out the old yeast, that you may be a new lump, even as you are unleavened. For indeed Christ, our Passover, has been sacrificed in our place. 8Therefore let’s keep the feast, not with old yeast, neither with the yeast of malice and wickedness, but with the unleavened bread of sincerity and truth.
9I wrote to you in my letter to have no company with sexual sinners; 10yet not at all meaning with the sexual sinners of this world, or with the covetous and extortionists, or with idolaters, for then you would have to leave the world. 11But as it is, I wrote to you not to associate with anyone who is called a brother who is a sexual sinner, or covetous, or an idolater, or a slanderer, or a drunkard, or an extortionist. Don’t even eat with such a person. 12For what do I have to do with also judging those who are outside? Don’t you judge those who are within? 13But those who are outside, God judges. “Put away the wicked man from among yourselves.”
The Apostle Paul identifies himself as the writer of 1 Corinthians twice within the epistle (1:1-2; 16:21). Pauline authorship of 1 Corinthians is almost unanimously accepted throughout Biblical scholarship. Clement of Rome (ca. A.D. 95), one of the earliest Church Fathers, confirmed Paul's authorship in his To the Corinthians (ch. 47). Pauline authorship was also confirmed by Polycarp, Irenaeus, Clement of Alexandria and Tertullian. 1 Corinthians was one of the most quoted of Paul's epistles in the writings of the early Church Fathers.
Paul probably wrote 1 Corinthians while ministering at Ephesus during his third missionary journey. In 1 Corinthians 16:8 Paul says that he would remain in Ephesus until Pentecost. This, coupled with Acts 20:31, indicates that the time of writing was in the last year of his three-year stay in Ephesus. That would place the date of the epistle in the spring of A.D. 55/56. Most likely, Stephanas, Fortunatus and Achaicus carried the epistle from Ephesus to Corinth (see 1 Cor 16:18). The church would have been about four to five years old when they received the first Corinthian letter (see "Church at Corinth" for founding date).
Paul had left Corinth with Aquilla and Priscilla in the spring A.D. 53 to continue his second missionary journey. On his third journey, during his stay at Ephesus, he received word from the Corinthian believers. Paul's main purpose in this first letter to the Corinthians was to respond to the two pieces of correspondence he had received from the people of Chloe's house and from the church.
First, Paul had received a disturbing report from the household of Chloe (1:11). The report centered on divisions and on immorality in the church. These problems arose because the young Corinthian church had failed to protect itself from the decadent culture of the city. The immaturity of the Corinthians had given way to sectarian divisions. Believers rallied under the names of men in factions rather than uniting under the name of Christ (3:1-9). The pride that characterized Corinth had seeped into the church and divided it because men and their wisdom had been exalted over God's (3:18-23).
Chloe's household had also reported to Paul that the Corinthian believers were dragging each other into the pagan courts to settle their disputes (6:1). The arguments grew from their immature divisive spirits, while their desire to settle differences in pagan courts instead of the church illustrated their inflated estimation of human wisdom. Paul also confronted the sexual immorality that had grown in the church. Paul in a previous letter (not preserved by God for the church) had warned the believers to deal strongly with fornicators in their midst (5:9-11), but evidently the church had not corrected their negligence.
Second, Paul answered inquiries delivered from Corinth by Stephanas, Fortunatus and Achaicus (16:15-18). The believers had questions concerning several practical issues and on proper worship. Paul first dealt with obligations of marriage and singleness (7:1-40). He emphasized the importance of each one being content to live in the state that God had called them. Paul then developed a lengthy section (8:1-11:1) to answer concerns about Christian liberty in a depraved culture. Paul purposed not to strangle their liberty, but to protect them from falling back into idolatry. His guiding principle for liberty was God's glory. “Whether you eat or drink, or whatever you do, do all to the glory of God” (10:31).
Following this, Paul gave the Corinthians principles for orderly worship. Paul taught the believers concerning women's decorum in worship services whenever they would participate in public prophesying and praying (11:2-16) and then reminds his readers of the solemnity which ought to characterize the observance of the Lord's supper (11:17-34). Paul closes the section with an extended discourse on the place of spiritual gifts in the church. Though the church had been considerably gifted, their immaturity and pride caused many abuses of their gifts. Paul reminds them that their spiritual gifts came from God (12:11) and that they ought to serve to unify and edify His body (12:24-25; 14:1-4). Within this section, Paul wrote the great love chapter (ch. 13). The attitude behind the exercising of spiritual gifts was to be love, the fruit of the Spirit, which, in turn, was generated by the filling of the Spirit.
Before Paul closed his letter, he corrected a doctrinal matter within the church by writing the most detailed New Testament apologetic for the resurrection of Christ and Christians (15:1-58). To a church shot through with problems, this chapter became a fountain of encouragement bursting forth from the victory wrought by God through the resurrected Lord Jesus Christ (15:57).
The major purpose of 1 Corinthians was the correction of Christian conduct. Paul's eighteen months of intense labor and his deep compassion for the Corinthian church moved him to answer the reported problems quickly. He purposed to rebuke the immature pride that had caused the divisions, litigations and abuse of spiritual gifts. He sought also to instruct his readers in relationships, in Christian freedoms, in worship and in the doctrine of the resurrection.