One concept that really helps grasp the concept of living and ministering without doctrinal statements is idea of bounded and centered sets. This ideas was initially developed over 30 years ago by missiologist and anthropologist Paul Hebert in his book Anthropological Reflections on Missiological Issues . His ideas were then popularized by Michael Frost and Alan Hirsch in their book, Shaping of Things to Come , and in the book edited by Darrell Guder, Missional Church .

Below is a brief summary of Bounded and Centered Sets.

Bounded Sets

A bounded set is where we create a boundary, a theological border, a doctrinal fence, and separate those who are inside the fence from those who are out. It is an “us” versus “them” mentality where everyone on the inside is accepted, loved, and welcomed, while those outside the fence are kept away until they can change their beliefs and behaviors to fit the entry requirements.

The pastor and elders and leaders of the church or organization often serve as the gatekeepers in such situations, welcoming those who belong while admonishing those who don’t to “change their ways.”

Bounded Set Illustration

If it helps, you can think of a bounded set as a Western style horse corral. The cowboys build the fence to keep the horses from wandering away. Outside the fence is where wild beasts and rustlers reside, just looking for a chance to kill or steal a horse.

In this situation, the fence serves to protect the property of the cowboys, and also makes it easier for them to feed and care for their herd. Occasionally, a wild animal gets into the corral, where he is summarily shot.

Sometimes, however, the cowboys go out and capture some mustangs from the wild, and bring them back to the corral. But before these wild horses can be introduced to the rest of the herd, they must be broken. They must learn to enjoy the safety of the fence.

Usually, the wild horses are tamed, and introduced to the rest of the herd. Though they may still long for the freedom of the open range, they eventually learn that life inside the corral is pretty good. There are no predators and the food is easy to obtain. It is safe, warm, and clean, and there is plenty of time for food and friendship with other horses.

Bounded Set Churches

One can easily see the many similarities between the image of the horse corral and what is today the most prominent model for church. Doctrinal statements and membership requirements serve as the fence. The Pastor and Elders are the cowboys, who do most of the protecting and providing so that the horses can feel safe, warm, and clean, leaving plenty of time for food and fellowship.



As long as the horses have a good group of cowboys, it’s not a bad deal. The only real cost to the horses is their freedom.

Centered Sets

The other model is a centered set. In a centered set, there are no boundaries. There are no walls. There is no fence. There is no dividing line between “us” and “them,” no rules or guidelines to determine who is “in” and who is “out.” Everyone is loved, welcomed, and accepted, no matter what. Everyone automatically “belongs.”

But how is this different than just a random mass of people randomly milling around? Because of what is at the center. A centered set has no boundaries to keep people out, but it does have something compelling at the center which pulls people in. There are no gatekeepers turning people away, for everyone is on equal footing, being pulled toward the center.

In such a way, while everyone “belongs” in the set, involvement in the set is not based on who has made it through the gate and is now inside the fence, but rather is based on the proximity to the center, and the direction they are moving. Those who are closest to the center, who are clustered around the center, will be the most involved with each other. Those who are further out, but who are also moving toward the center, may also be involved with each other as they are drawn in. But they are not looked down upon for being “further out” for everyone, at some point or another, were also “further out.”

Everybody recognizes that it takes time to be drawn in, and some move faster while some move slower. Some even move backwards. In fact, lots of people do. Many get closer in to the center, and do not like what they see, and so start heading back in the opposite direction. But everybody understand this, because everybody has done it.

The pull toward the center is never so strong that it cannot be resisted, and everyone has resisted and drawn away from the center at one point or another, and so they understand that people sometimes pull back. But no matter how far someone pulls back, at no point do they ever stop “belonging” for there is no outer boundary that can be crossed.

Centered Set Illustration

If a horse corral helped picture the bounded set, a water hole in the African grasslands might be a good picture of a centered set. In many cases, there will be only one watering hole for miles and miles in any direction. This means that animals that live in the area will never stray too far from the water, especially in the dry season.

During the rainy season, they may stray further from the hole, but they always know where the water can be found, just in case the rains do not come. And during the dry season, when the rains do not come and the grass withers away and the ground is parched, it is not uncommon to find hundreds of different animals all sharing the same watering hole. Animals that at any other time of year might stay away from each other, or even prey on one another, will live in relative peace and safety near the water hole. Lions, zebras, deer, and birds will drink from the same water, and while the rains are absent, will not stray too far from the water, for they know that the water is their life.

There are no fences to pen them in, and no cowboys to keep the peace, and yet the draw of the water is enough to accomplish both.

Centered Set Churches

While centered sets are not the common way of doing church today, they are becoming more common, and will be, I believe, the predominant model of the future.

People of all backgrounds and beliefs will be welcomed at the table to join in the conversation, to participate in serving the community, to learn from and challenge each other, and to encourage one another to move ever closer to Jesus Christ. In such an atmosphere, there is room for people of all faiths, all backgrounds, all races, and all creeds.

As Frost and Hirsch point out, “In a centered-set church it is recognized that we are all sinners, all struggling to be the best people we can be. But we also believe that the closer one gets to the center (Christ), the more Christlike one’s behavior should become. …No one is considered unworthy of belonging because they happen to be addicted to tobacco, or because they’re not married to their live-in partner” (p. 49). And I might add to this, “…or because they hold to some doctrine which we think is heretical.”

What do you think of these two approaches? What are the benefits or dangers of both? Where else do you see these types of sets in nature or society? Do you think a bounded-set church can become a centered-set?