A Common Word in Need of a Careful Definition

If everything is mission, nothing is mission. — Stephen Neill

IF YOU'RE READING THIS BOOK, you're probably a Christian. And if a Christian, you probably take some kind of interest in the church. And if you've been involved in a church, you've probably wondered from time to time, "What are we trying to accomplish anyway?" Maybe as a pastor you've asked yourself, "With everyone interested in their own program and passionate about their own cause, are we even aiming at the same thing?" Maybe as a Christian businessman or stay-at-home mom you've thought, "I know we are supposed to glorify God. But under that big umbrella, what does God want our church to be doing?"

At their root, these questions all ask the same thing: What is the mission of the church?

The question is deceptively complex and potentially divisive. For starters, what do we even mean by mission? And if that can be settled, we then face more difficult questions. Is the mission of the church discipleship or good deeds or both? Is the mission of the church the same as the mission of God? Is the mission of the church distinct from the responsibilities of individual Christians? Is the mission of the church a continuation of the mission of Jesus? If so, what was his mission anyway?

Related to these questions are others: What should be the church's role in pursuing social justice? Are we right to even use that phrase, and what do we mean by it? Does God expect the church to change the world, to be about the work of transforming its social structures? What about the kingdom? How do we build the kingdom of God? Or are we even capable of building the kingdom? How does the kingdom relate to the gospel? How does the gospel relate to the whole story line of the Bible? And how does all of this relate to mission?

Despite all these questions, there is a lot that evangelicals can agree on when it comes to mission: the gospel is, at the very least, the good news of Jesus's death and resurrection; proclamation is essential to the church's witness; heaven and hell are real; people are lost without Jesus; bodies matter as well as souls; and good deeds as the fruit of transformed lives are not optional. But if we are to find a lasting and robust agreement on mission praxis and mission priorities, we must move past generalities and build our theology of mission using the right categories and the right building blocks. In other words, as we grasp key concepts like kingdom, gospel, and social justice, we will be better able to articulate a careful, biblically faithful understanding of the mission of the church. And just as important, we'll be able to pursue obedience to Christ in a way that is more realistic, freeing, and, in the long run, fruitful.

What Is Mission?

Before going any further in answering the question posed in this book's title, we should acknowledge the difficulty in the question itself. A big part of the problem in defining the mission of the church is defining the word mission. Because mission is not a biblical word like covenant or justification or gospel, determining its meaning for believers is particularly difficult. We could do a study of the word gospel and come to some pretty firm biblical conclusions about "What is the Gospel?" — and we will, later in this book!1 But mission is a bit trickier. On the one hand the Latin verb mittere corresponds to the Greek verb apostellein, which occurs 137 times in the New Testament. So mission is not exactly extrabiblical. But as a noun, mission does not occur in the Bible, which makes the question of this book more difficult.

The answer to the question, "What is the mission of the church?" depends, to a large degree, on what is meant by "mission." One could make a case that glorifying God and enjoying him forever is the mission of the church, because that is our chief end as redeemed believers. Someone else might argue that loving God and loving neighbor is the best description of our mission, because those are the greatest commandments. And someone else might borrow from the nineteenth-century hymn and argue that trust and obey is the essence of our mission, because that is the great call of the gospel message. In one sense we would be foolish to argue with any of these answers. If mission is simply a synonym for living a faithful Christian life, then there are dozens of ways to answer the question, "What is the mission of the church?"

But isn't it wise to aim for a more precise definition of such a common word? We've never met a Christian who was against mission. In fact, every church we've ever known would say they are passionate about mission. So shouldn't we try to be clear what we are all for? Christians have long seen the importance of carefully defining other theological words like Trinity, essence, and inerrancy. Theology will not go far without careful attention to distinctions and definitions. So why not work toward a definition of mission? Christians often talk about mission trips, mission fields, and mission work, so it would seem to be a good idea at least to attempt to define what we are talking about. Granted, word meanings can change, and it may not be possible to rein in the definition of mission after fifty years of expansion. But it seems to us that a more precise definition is necessary, if for no other reason than the conviction that Stephen Neill's quip is spot-on: "If everything is mission, nothing is mission."

But where to start with a definition? In his influential book Transforming Mission, David Bosch rightly argues, "Since the 1950s there has been a remarkable escalation in the use of the word 'mission' among Christians. This went hand in hand with a significant broadening of the concept, at least in certain circles." It used to be that mission referred pretty narrowly to Christians sent out cross-culturally to convert non-Christians and plant churches. But now mission is understood much more broadly. Environmental stewardship...