In the introduction to First Corinthians Paul mentions an associate, Sosthenes, who may have penned the letter as dictated by Paul. This is likely, since toward its conclusion we read: “Here is my greeting, Paul’s, in my own hand.”​—1Co 1:1; 16:21.

Two inspired canonical letters written by the apostle Paul to the Christians in Greece during the first century C.E. The letters stand in seventh and eighth places, respectively, in most English versions of the Christian Greek Scriptures. Paul identifies himself as the writer of both letters, addressing First Corinthians to “the congregation of God that is in Corinth,” and Second Corinthians to “the congregation of God that is in Corinth, together with all the holy ones who are in all of Achaia.”​—1Co 1:1, 2; 2Co 1:1.

That Paul did indeed write First and Second Corinthians cannot be seriously questioned. In addition to the apostle’s own testimony, the authenticity and general acceptance of both letters are attested by external testimony. The two letters are ascribed to Paul and quoted by writers of the first to the third centuries. Also, what is known as “The Canon of Athanasius” (367 C.E.) lists, among “fourteen letters of Paul the apostle,” “two to the Corinthians.” This list is the first example of the catalog of books of the Christian Greek Scriptures as we have them today, preceding by 30 years the list published by the Council, or Synod, of Carthage, Africa, in 397 C.E.