Francis J. Hall calls the doctrine of the Trinity “the most fundamental and significant of Christian doctrines,” for it determines the meaning of all Christian doctrine and practice, and the entirety of the Gospel depends on its truth. In fact, says Hall, it is impossible to understand Christianity without first understanding the doctrine of the Trinity. As long as the doctrine of the Trinity is neglected, Christianity constitutes little more than an abstraction.
Hall’s volume on the doctrine of the Trinity contributed to the resurgence of the study of Trinitarian theology in the twentieth century in both Roman Catholic and Protestant circles. He includes chapters on the divine persons, the economic Trinity, the biblical evidence for the Trinity, and the controversial history of the doctrine. This robust and intelligible doctrine of the Trinity is needed more than ever today for vindicating and revitalizing belief in a personal God.