When I say, “I think churches should be intentional and serious about helping their members believers develop significant relationships with believers of other ethnicities and social classes.” 

It seems like people often hear, “I am American and I like spending time with people that look different than me because we can be a little like that.”

When I actually mean, “I believe doctrines like justification, the five points of Calvinism, and the glory of God, all have *”inalienable ecclesiological implications,” including transforming the way in which we relate to other people and producing a deep concern for all people coming to know Christ and worship Him.”

Which is part of why when people say, “I am indifferent to multi-ethnic and multi-social classes loving God and loving each other within the same local church.”

I hear, “I am not that serious about Reformed and biblical theology.” 

Thank you John Piper for saying it so, so much better than I ever could! Please listen to his lecture, The New Calvinism and the New Community.

“Wherever you find a failure to take seriously the multi-ethnic nature of Christ’s new community, what you find is not a people hindered by their Reformed theology, but blind to its inalienable, biblical implications.” John Piper

*”I remain unpersuaded that the Reformation has gotten it wrong and that for Paul justification is at least primarily, if not entirely, about ecclesiology rather than soteriology, about whom you may eat with and are to have fellowship as a Christian rather than how you became a Christian.

For Paul,justification undoubtedly has inalienable ecclesiological implications and these are a prominent concern especially in Galatians. These implications must not be denied, obscured, or downplayed through an unduly individualistic soteriological mindset. No doubt too they have not been appreciated heretofore as they should. But justification in Paul is essentially, primarily soteriological. It is a “transfer” term describing what takes place in an individual’s transition from wrath to grace. (44–45)” Richard Gaffin