Soundness is an old-fashioned word. Yet we should cherish soundness—soundness in our understanding of the God of the Bible and his ways with us. Paul uses the word “sound” a number of times in his pastoral writings to Timothy and Titus. It means “reliable,” “accurate,” or “faithful.” At root, it is an image from the medical world meaning whole or healthy. Biblically sound theology, then, is theology that is faithful to the teaching of the entire Bible. It reliably and accurately interprets