This contemporary approach to basic doctrine offers a crucial tool for students who want comprehensive, consistent, logical theology. God In Three Persons will enhance undergraduate theological courses and has applications for graduate systematics and historical theology study. Erickson surveys the background for today's debate, showing that modern controversies simply rephrase old arguments. At its core this book is a close study of scripture, especially the key teachings of John's Gospel. Erickson also considers whether belief in the Trinity is requisite to salvation, whether it makes any practical difference in the Christian world view, and whether it is logical and intelligible. The book's contemporary statement of the Trinity doctrine sets forth and applies all biblical evidence to Christianity at large and worship and prayer in particular.