David Wilkerson said this quote

A suburban pastor maintained services appropriate for his respected, professional parish. His father, an excitable traveling evangelist, visited and challenged the congregation to confront pride and sing out loudly with the windows open. The next day, the pastor’s banker mentioned overhearing, and he was sheepish. The buttoned-up banker said, though, that the neighborhood had been WAITING TO HEAR the church live out the joy they claimed.