In the Pastoral Epistles, St. Paul writes to Timothy and Titus, his close friends and ministry partners, regarding the false teaching which has taken root in their churches. In three letters—one to an established church rocked by false teaching (1 Timothy), another to a young, fledgling church plant (Titus), and, finally, St. Paul’s last words to his son-in-the-faith (2 Timothy)—the apostle reveals God’s vision for what it means to be the church: God’s faithful family living out God’s mission of making disciples from all nations. In this study of these letters, we explore the theme of fidelity as St. Paul relates it to God, sound doctrine, the church, and mission.