[Editor's Note: In the following post Southeastern Associate Professor of Historical Theology and Baptist Studies, and already well-known BtT blogger extraordinaire, Nathan Finn, guides us through the corridors of God's economy as he explains why we need the past.]
Most of all, perhaps, we need intimate knowledge of the past. Not that the past has any magic about it, but because we cannot study the future, and yet need something to set against the present, to remind us that the basic assumptions have been quite different in different periods and that much which seems certain to the uneducated is merely temporary fashion. A man who has lived in many places is not likely to be deceived by the local errors of his native village: the scholar has lived in many times and is therefore in some degree immune from the great cataract of nonsense that pours from the press and the microphone of his own age.
The words quoted above are taken from an address C. S. Lewis first gave in 1949. As most readers of Between the Times will know, Lewis was a renowned scholar of medieval literature, a popular Christian apologist, and the author of the beloved Chronicles of Narnia series of children’s books. Though he was not a professional historian by training, as both a scholar and a Christian, Lewis understood the importance of the past. The past takes us places. The past provides needed perspective. The past keeps us humble. Lewis prized the past so much that he famously suggested that the reading of old books is preferable to the reading of new books. “It has always therefore been one of my main endeavours as a teacher,” Lewis writes, “to persuade the young that firsthand knowledge is not only more worth acquiring than secondhand knowledge, but is usually much easier and more delightful to acquire.” Any historian worth his or her salt would agree.
Unfortunately, not everyone would agree that knowledge of the past is valuable (or at least interesting). I have taught history courses for almost a decade to thousands of undergraduate students, seminary students, and research doctoral students. More than a few have informed me that they are not really that “in” to history—even Christian history. A few have even nodded off in class—doubtless a reflection of their lack of sleep rather than my abilities as a teacher! Truth be told, I can remember a season in my life when history seemed less-than-appealing. Though that changed my junior year of high school in an advanced placement United States History course taught by Coach Joe Haluski. At best, many people have a utilitarian view of history; they care to the degree they find history useful for the stuff that really matters in life. Almost everyone can quote at least a paraphrase of George Santayana’s famous quip, “Those who cannot remember the past are condemned to repeat it.”
As a church historian, I see myself as promoting three key themes among my students. First, I need to persuade them that how we interpret the past should arise in part from the Christian worldview and the best of the Christian intellectual tradition. History should matter for us because it matters in God’s economy. Second, I need to convince them that all of Christian history is our history—even the parts that are less appealing or seem remote from our contemporary experiences. This can be a hard sell sometimes. After all, the past is so . . . different. Finally, I need to model for them how to apply insights from church history in such a way that it builds up the body of Christ, strengthens our spiritual walks with Christ, and helpfully informs our ministries. Church history has a pastoral function; to miss this in a seminary class would be a tragedy.
To be sure, not every student will find church history to be as scintillating as I do. I can live with that. Even for many students who do come to find the topic at least marginally interesting, their church history courses will not be their favorite classes. That’s okay, too. However, I hope students walk away from our church history courses at Southeastern Seminary understanding that the past matters—it matters for their spiritual lives, their churches, and their present and future ministries. C. S. Lewis was right: we need intimate knowledge of the past. This is especially true of the Christian past. In our current context, far too many Southern Baptists and other evangelicals unknowingly bow before the idol of the new and the novel, often forgetting the wisdom of those who have gone before us. Church history can be a means of grace in mortifying this particular idolatry and taking the long view of how God works among all his people in every time and every place to bring about his glorious purposes.
 C. S. Lewis, “Learning in War-Time,” in The Weight of Glory: And Other Addresses (New York: HarperOne, 2001), 58–59.
 C. S. Lewis, “On the Reading of Old Books,” in God in the Dock: Essays on Theology and Ethics (Grand Rapids, MI: Eerdmans, 1972), 200. This essay was originally published in 1944 as Lewis’s introduction to a new edition of Athanasius’s On the Incarnation of the Word.
 George Santayana, The Life of Reason: Or the Phases of Human Progress (New York: Charles Scribner’s Sons, 1920), 284.