The traditional and widely accepted answer is that the apostle Paul wrote First Corinthians, with Sosthenes named alongside him in the opening greeting as a co-sender or secretary.

Quick Scoop: Who Wrote First Corinthians?

First Corinthians is part of the New Testament and is counted among the Pauline letters, meaning it is attributed to Paul the Apostle. In the very first verse, the letter identifies itself as coming from “Paul” and mentions “Sosthenes,” which early Christians understood as Paul’s associate involved in the composition or sending of the letter.

What Scholars Say

Most modern scholars—across a wide range of Christian traditions and secular academic settings—accept Paul as the genuine author of First Corinthians. The style, theology, and historical details in the letter line up closely with what is known of Paul’s other writings and his work in the city of Corinth.

Some scholars suggest the text may preserve echoes of more than one communication from Paul (because Paul refers to an earlier, now-lost letter), but they still regard First Corinthians itself as authentically Pauline. There is no serious manuscript tradition that attributes the letter to anyone other than Paul.

A Note on Sosthenes

Sosthenes is listed in the opening line, likely as a co-sender or the person who physically wrote the letter down at Paul’s direction (an ancient secretary, or amanuensis). A number of commentators think this means Sosthenes contributed more than simply copying, but the content is still regarded as Paul’s teaching and authority.

TL;DR: First Corinthians is almost universally regarded as a letter from Paul the Apostle , sent to the church in Corinth, with Sosthenes involved as co-sender or writing assistant.

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