" Scripture, tradition, reason, and experience. However, because this book is designed for an evangelical audience, which in principle holds that Scripture is the final arbiter of theological truth (sola scriptura), and because these essays are brief and introductory in nature, the emphasis in most essays is on defending each position biblically. We encourage teachers and students to integrate more thoroughly considerations of tradition, reason, and experience as they critically evaluate various positions. 5. "

― Gregory A. Boyd , Across the Spectrum: Understanding Issues in Evangelical Theology