Prayerlessness is a problem in so many churches. What can we do about it?

Practicing church discipline is difficult. Perhaps this is why many churches seem to have neglected it.

Christians should be persuasive, and with his new book Fool's Talk, Os Guinness offers a comprehensive presentation of the art and power of creative and distinctly Christian persuasion.

How should this desire to be persuasive affect our evangelism? Does God expect us to know the answers to every question? And how can we do this while remaining humble, recognizing that salvation is all of grace?

For our most recent 9Marks interview, Mark Dever sits down with Guinness to talk with him about these questions and more. We hope you'll find it useful.

What is baptism? What does baptism mean? Is it simply an individual's declaration that they now belong to Jesus? Is it a sign and seal of the new covenant, just as God intended circumcision to be a sign and seal of the old? And what does all of this have to do with church membership? Is church membership for everyone? Only baptized believers? Baptized believers and their children?

How do we apply the gospel to same-sex attraction? Why does a teenager struggling with self-cutting need to hear about justification by faith alone? How in the world can a biblical doctrine of God help a husband prone to anger?

If God the Holy Spirit left your church this weekend, what would happen next?

Where do elders come from? Is there a way to raise them up without trying to "reverse engineer" a man-made process? And once a church has elders, how can they stay unified? What does "unity" among elders even look like? Must they agree on every single thing?

In the last of a three-part interview,* Mark Dever interviews Tim Keller about his book-writing ministry, how he attempts to confront a secular audience with the gospel, and more.

Mark Dever interviews Tim Keller about his pastoral legacy, what a typical Sunday morning looks like for him, his dichotomy-refuting "third way-ism," and much more.

Mark Dever interviews Tim Keller about his conversion, what led him to New York City, why the cultural gap between generations has exponentially grown in recent decades, and much more.