Galatians 1:19 identifies James as the Lord's brother, clarifying which James is speaking at the council in Acts 15:13.

In Galatians 2:9, James is listed as a pillar of the church, confirming his leadership role seen here when he gives the decisive verdict.

James 1:1 identifies the author as James, servant of God—the same James speaking here, linking his pastoral letter to his leadership in Acts.

In Galatians 2:12, James's authority is implied as men from him influence Peter's behavior, showing James's far-reaching impact in the early church.