More than 1,500 years after the foundational church councils, the doctrine of the Trinity is still as central and as puzzling to theologians as ever. Reformed theology has seen increasing calls for the Trinity to live at the center of Christian confession, prompting the need for a fuller biblical and practical understanding of the subject. In recent Reformed thought, Cornelius Van Til and Cornelius Plantinga, Jr. have proposed important trinitarian theologies. Ralph Smith assesses these views and, filling out a Van Tilian perspective with Kuyper's lesser-known covenantal view, he provides a refreshing biblical, historical, and applicable perspective on this key Christian reality.