The doctrine of the Trinity has received considerable attention in recent years. These essays demonstrate the substance and importance of the doctrine for Christian faith, particularly in worship, in the reading of Scripture, and in the church\'s mission. The contributors are Philip W. Butin, John R. Franke, Edith M. Humphrey, Mark Husbands, Keith E. Johnson, Robert K. Lang\'at, David Lauber, Gordon T. Smith, Daniel J. Treier, Leanne Van Dyk, Kevin J. Vanhoozer and John D. Witvliet.