how to kill your mission

In this interview, John Dickson was asked about how to effectively engage the broader culture. His remarks, although pertaining to Australian society, have much to say to the needs of the church in the UK:

What advice do you have for church leaders in America about how to engage the broader culture effectively?I think the very first thing is to do is adopt a stance of mission instead of admonition toward the world. Here's an example. In the Australian context, there are church leaders who remember the glory days when about 20 percent of the nation went to church. They look at how Australia is secularized today, and their stance toward the world is basically admonition, the way you would talk to a backsliding Christian. How dare you slide away? How dare you legislate against Christian morality? I call that the admonition paradigm.
What's wrong with this approach?
I reckon that's how you kill your mission, because if you speak with a sense of entitlement, you won't be flexible, you won't be humble, and you won't take hits and just bear it. You'll want to strike back. And people will think you're arrogant. Quite rightly, probably.
What do you recommend instead?
When you move out of admonition into mission, you realize Australia is no longer Jerusalem; it's Athens. Then you instantly adopt a humbler approach to non-Christians. You don't expect them to live Christian lives if they don't confess Christ. You don't expect Parliament to pass Christian-specific laws. But as a leader, you try to persuade the nation with winsomeness, with gentleness and respect, as Peter says in 1 Peter 3:15.