John Piper on False Teaching and Doctrinal Clarity

I listened to this a while ago and as you follow the link you will find taht you are able to read, watch or listen to John Piper's sermon on Romans 16: 17-20.

Here's an extract to whet your appetite:

'In other words, when a person departs from the doctrine that the apostles had taught, Paul sees this as a greater threat to unity than the disunity caused by avoiding such people. If we say: How can that be? How can dividing from a false teacher who rises up in the church promote unity in the church? The answer is that the only unity that counts for unity in the church is rooted in a common apostolic teaching. Isolating false teachers—avoiding them—is Paul’s strategy for preserving unity that is based on true teaching.'

Here's the link:
www.desiringgod.org/ResourceLibrary/Sermons/ByDate/2006/1872_Watch_Out_for_Those_Who_Lead_You_Away_from_the_Truth/