From Nicaea to now: rediscovering how the Triune God shapes faithful ministry in a modern world. In this illuminating collection marking the 1700th anniversary of the Council of Nicaea, distinguished scholars and ministry practitioners from Duke Divinity School explore how Trinitarian faith continues to transform Christian identity and practice. Moving beyond abstract formulations, this volume demonstrates the enduring power of Nicene confession to shape faithful witness in today's complex landscape. With an introduction from Dean Edgardo Colón-Emeric, this volume brings together biblical interpretation, theological reflection, compelling sermons, and practical wisdom. Contributors reveal how the doctrine of the Trinity provides vital resources for addressing contemporary challenges—from the climate crisis to political division, from church renewal to spiritual formation. The essays examine how Trinitarian theology shapes worship, informs preaching, guides ethical engagement, and empowers mission. Contributors include William Willimon, Jerusha Neal, Luke Powery, and Jung Choi, among others. Their diverse perspectives illuminate how the ancient affirmation of Father, Son, and Holy Spirit remains a living confession with power to transform individuals, communities, and creation. Whether you're a pastor seeking to proclaim Trinitarian faith with clarity, a church leader navigating institutional change, or a believer wanting to deepen your theological understanding, this volume offers both intellectual substance and spiritual nourishment. Trinitarian Matters invites readers to discover how the church's foundational confession of the Triune God continues to inspire faithful ministry and mission in the twenty-first century.