When I have said this, some hearers look highly nonplussed. Such is the correlation in our minds of church and Gospel. Others are interested in the underlying assumptions. Some understand exactly. And 'church' here means the institutional form, not the status of being part of the church by virtue of baptism.
(1) William Stringfellow, "A Lawyer's Work", Christian Legal Society Quarterly 3, No 3 (1982)