The word missional’s meaning is rooted deeply within the understanding of the church’s purpose. This purpose displays itself in three different ways. The church is a missionary sent on mission as a sign and instrument of the Missio Dei. The first area in which we are called to be missional is as a missionary in our own culture. The general idea of a missionary is a person in a foreign country in a completely non-Christian culture. But in reality, today all Christians live in non-Christian cultures. Tim Keller gives insight into this reality by focusing on the missionary Lesslie Newbigin:

The British missionary Lesslie Newbigin went to India around 1950. There he was involved with a church living ‘in mission’ in a very non-Christian culture. When he returned to England some 30 years later, he discovered that now the Western church too existed in a non-Christian society, but it had not adapted to its new situation. Though public institutions and popular culture of Europe and North America no longer ‘Christianized’ people, the church still ran its ministries assuming that a stream of ‘Christianized,’ traditional/moral people would simply show up in services. Some churches certainly did ‘evangelism’ as one ministry among many. But the church in the West had not become completely ‘missional’—adapting and reformulating absolutely everything it did in worship, discipleship, community, and service—so as to be engaged with the non-Christian society around it. It had not developed a ‘missiology of western culture’ the way it had done so for other nonbelieving cultures.

Even if you are in a “Christianized” culture, the reality is that we still need to view ourselves as missionaries. Every culture needs some amount of contextualization of the gospel. This means that you have to be missionary to do the contextualization needed to present the gospel.

What is the difference between a church that has missions and a missional church? This seems to be the question that everyone is asking lately, and it has been one that I’ve been developing a personal answer to for a while.

There always seems to be a new buzzword in Christian circles every few years. The words enter our vocabulary quickly and leave just as fast. People reword mission and purpose statements around them, and some even restructure their entire church around them. “Seeker-sensitive,” “purpose-driven,” “organic,” and “emerging” are just a few, but the newest to be added to the list is the word “missional.” It is the new buzzword of our day. There are missional churches, missional small groups, missional preaching, missional books, missional degrees, and even missional missiology.

But what does “missional” mean exactly? Most people use it without even stopping to determine what it means. Worst yet, some simply make it mean what they want it to mean to give themselves license to do idiotic and irrelevant acts. This is a sad thing, because the word missional has a deep and beautiful meaning for our churches today.