The Tuesday night prayer meeting at Brooklyn Tabernacle felt like skydiving into a tornado, exhausting and exhilarating all at once. I'd read about the meeting in Pastor Jim Cymbala's book Fresh Wind, Fresh Fire, but nothing prepared me for the event itself: 3,500 God-hungry people storming heaven for two hours.

Afterward, my friend and I went out to dinner with the Cymbalas. In the course of the meal, Jim turned to me and said, "Mark, do you know what the number one sin of the church in America is?" I wasn't sure, and the question was rhetorical anyhow. "It's not the plague of internet pornography that is consuming our men. It's not that the divorce rate in the church is roughly the same as society at large."

Jim named two or three other candidates for the worst sin, all of which he dismissed. "The number one sin of the church in America," he said, "is that its pastors and leaders are not on their knees crying out to God, 'Bring us the drug-addicted, bring us the prostitutes, bring us ...