The doctrine of the trinity is probably the most complex and mysterious topic in Christian theology, yet it impacts our understanding of many other doctrines. Pastor/Theologian Robert D. Cornwall brings his knowledge of church history to the task of examining this doctrine, looking at how it developed and what justifies its presence in Christian theology. He uses the history of his own Disciples of Christ tradition as one of the expressions of the Stone-Campbell movement, which avoids creeds very effectively in examining how we distinguish between the statements and events of scripture and our theological reflections on them. Can a doctrine not mentioned in scripture be of value? Are creeds necessary or even useful? Cornwall threads a careful course between the value of the creeds, and within them the doctrine of the trinity, in defining our ecumenical relationships and task on the one and, and on the other the danger of having creeds as a test of fellowship and faith. While rooted in his own denomination's traditions, this is very valuable to other denominations and movements as we examine what defines us while at the same time seeking freedom in non-essentials. This book is especially strong in examining the history of the development of this doctrine and connecting this to our ongoing reflection on scripture and what our tradition and experience provides. This short volume is valuable to all those who seek to understand the trinity not just as an element in a doctrinal system, but as it aids us in thinking about elements of our faith.