The title there is part of a larger quote:
“I have come to feel that the primary reality of which we have to take account in seeking for a Christian impact on public life is the Christian congregation. How is it possible for the gospel to be credible, that people should come to believe that the power which has the last word in human affairs is represented by a man hanging on a cross? I am suggesting that the only answer, the only hermeneutic of the Gospel, is a congregation of men and women who believe it and live by it.” (Lesslie Newbigin, The Gospel in a Pluralistic Society, London: SPCK, 1989 (227))
This is tough. Not only BELIEVE. He throws in there LIVE BY IT as well. I’m not sure we’ve done a great job with the first part–the whole believing part. But I know we’ve struggled with the second part–living by it.