Paul and Timothy address the church in Corinth and believers throughout Achaia, probably from Macedonia around AD 55–56. After a painful visit and a severe, tearful letter that may be lost or may survive in part in chapters 10–13, Titus brings news that opens a path toward reconciliation. Paul explains his changed travel plans, urges forgiveness, portrays apostolic ministry through suffering and God’s power in weakness, renews the collection for Jerusalem, and answers rival “super-apostles” who challenge his authority. The setting belongs broadly between Paul’s Ephesian ministry and later journey through Macedonia and Greece in Acts 19–20, though Acts omits much of the conflict. Pauline authorship is secure, but scholars debate whether the book preserves one letter or several pieces from this troubled correspondence.
Paul opens with comfort in suffering, defends his ministry changes, and declares that the new covenant transforms lives. Though he carries this treasure in jars of clay, God sustains him. He calls the Corinthians to holiness and celebrates their repentance and reconciliation.
Paul urges the Corinthians to complete the collection for the Jerusalem saints, holding up the Macedonian churches as examples of joyful sacrifice. He grounds Christian generosity in the grace of Christ who became poor so that believers might become rich, and promises that God loves and blesses a cheerful giver.
In the letter's sharpest section, Paul defends his apostleship against false teachers, boasting only in his weaknesses and sufferings. His dramatic 'fool's boast' lists unmatched suffering for Christ, then describes a thorn in the flesh that taught him God's power is made perfect in weakness. He closes with a final call to self-examination and a prayer for their restoration.