Most evangelicals identify the author of Galatians 6:1 as the Apostle Paul. Here’s a concise, evangelical-oriented summary of who he is and why Paul is regarded as the author — with brief application tied to Galatians 6:1.

Who Paul is (evangelical summary)
– Formerly Saul of Tarsus, a Pharisee who persecuted the church until his dramatic conversion on the Damascus road (Acts 9).
– Called by Christ to be the apostle to the Gentiles and a primary missionary and church planter in the first century.
– Credited with writing many New Testament epistles that shape core Christian doctrine, especially justification by faith.

Why evangelicals attribute Galatians (including 6:1) to Paul
– Internal evidence: The letter claims Pauline authorship in its opening (Galatians 1:1). The body of the letter contains autobiographical material (Gal. 1–2) where the author defends his apostolic authority and gospel, strongly matching Paul’s life and concerns. Galatians 6:11 even says, “See what large letters I use as I write with my own hand,” which evangelicals take as a signature-like touch that supports Pauline authorship.
– Style and theology: The letter’s emphasis on justification by faith, the role of the Spirit, Christian freedom, and a confrontational pastoral tone fits Paul’s known theology and temperament.
– Early and continuous church attestation: The early church consistently received Galatians as Pauline and canonical, cited by early Fathers and included in the New Testament corpus.

Date and context (brief)
– Written in the mid-first century to churches in Galatia (there is some scholarly debate about exact date and whether “Galatia” refers to northern or southern areas). Evangelicals typically place it during Paul’s active missionary career (often dated around AD 48–55).
– Purpose: to confront a threat that Gentile believers were being pressured to adopt Jewish law-works as necessary for salvation and to reassert the gospel of grace and life in the Spirit.

How Galatians 6:1 fits in Paul’s message
– Galatians 6:1 (NIV): “Brothers and sisters, if someone is caught in a sin, you who live by the Spirit should restore that person gently. But watch yourselves, or you also may be tempted.”
– The verse reflects central Pauline themes: restoration in the body of Christ (not condemnation), the ministry of the Spirit in shaping Christian behavior, humility and accountability, and the practical outworking of gospel truth in communal life. Evangelicals read it as authoritative apostolic teaching on church discipline and pastoral care.

Pastoral implications emphasized in evangelical circles
– Restoration, not retribution: Seek to bring a fallen believer back to repentance with gentleness.
– Spirit-led action: Those who “live by the Spirit” are called to lead restoration, relying on Spirit-produced fruit (Gal. 5).
– Watchfulness and humility: Restorers must guard against pride and temptation themselves.
– Community responsibility: Believers share mutual responsibility for one another’s spiritual health.

If you want further reading (evangelical resources)
– Thomas R. Schreiner, commentary on Galatians (Baker Exegetical Commentary)
– F. F. Bruce, commentary on Galatians (New International Commentary)
– Short evangelical studies or sermons on Galatians that emphasize justification by faith and pastoral application

If you’d like, I can summarize Paul’s autobiographical defense in Galatians 1–2, outline the structure of the letter, or give sermon-style applications for Galatians 6:1. Which would help you most?