The UP is obviously that groups are focused on and lead by Jesus and God's will.
The OUT is about looking outside the christian community,
The IN is about ministering into the community.
I was talking this week with someone who went to a church where a similar triangle was used except there was something missing. There was UP and there was OUT but no mention of IN. Not that there was any suggestion that the church wasn't looking after its own but I guess looking at evangelism perhaps it wasn't seen as significant to mention.
I can sympathise with that. Trying to motivate a church to look OUT can be hard when people often attend because of the ministry IN. People can readily become consumers of Church - they want and come to expect an experience of worship, or preaching and teaching or friendship and fellowship that meets their needs, or maybe their wants, so that they enjoy the experience and feel fulfilled. We like to feel nurtured, loved and supported.
But maybe this misunderstands the purpose of IN. Just as in an earlier blog we looked at Matthew 28 and evangelism as making disciples rather than converts, once a person moves from OUT to IN that process of making a disciple doesn't stop.
So in encouraging each other towards discipleship when we move towards missional communities what will the IN look like? Most of us don't like change, especially if it disrupts our somewhat cosy routines, but what positive moves can we take to make disciples of each other?

