This book is about the problem of truth: what truth is, and how we can tell whether what we have said is true. Bruce Marshall approaches this problem from the standpoint of Christian theology, and especially that of the doctrine of the Trinity. The book offers a full-scale theological account of what truth is and whether Christians have adequate grounds for regarding their beliefs as true. Unlike most theological discussions of these issues, the book is also extensively engaged with the modern philosophical debate about truth and belief.